--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+<glossary xmlns="http://docbook.org/ns/docbook"
+ xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="rs_glossary"
+ version="5.0" role="auto">
+ <title>Glossary</title>
+ <info>
+ <legalnotice>
+ <para>Licensed under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in
+ compliance with the License. You may obtain a copy of
+ the License at</para>
+ <para>
+ <link
+ xlink:href="http://www.apache.org/licenses/LICENSE-2.0"
+ >http://www.apache.org/licenses/LICENSE-2.0</link>
+ </para>
+ <para>Unless required by applicable law or agreed to in
+ writing, software distributed under the License is
+ distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ CONDITIONS OF ANY KIND, either express or implied. See
+ the License for the specific language governing
+ permissions and limitations under the License.</para>
+ </legalnotice>
+ </info>
+ <!-- .A. -->
+ <glossdiv>
+ <title>A</title>
+ <glossentry>
+ <glossterm>absolute limit</glossterm>
+ <glossdef>
+ <para>Impassable limits for guest VMs. Settings include
+ total RAM size, maximum number of vCPUs, and
+ maximum disk size.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>access control list</glossterm>
+ <glossdef>
+ <para>A list of permissions attached to an object. An ACL specifies which users or system processes have access to objects. It also
+defines which operations can be performed on specified objects.
+Each entry in a typical ACL specifies a subject and an operation. For instance, ACL entry, <code>(Alice, delete)</code>, for a file gives Alice permission to delete the file.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>access key</glossterm>
+ <glossdef>
+ <para>Alternative term for an Amazon EC2 access key.
+ See EC2 Access key.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>account</glossterm>
+ <glossdef>
+ <para>The Object Storage context of an account. Do not confuse
+ with a user account from an authentication service such
+ as Active Directory, /etc/passwd, OpenLDAP,
+ OpenStack Identity Service, and so on.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>account auditor</glossterm>
+ <glossdef>
+ <para>Checks for missing replicas and incorrect or
+ corrupted objects in a specified Object Storage account by
+ running queries against the back-end SQLite
+ database.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>account database</glossterm>
+ <glossdef>
+ <para>A SQLite database that contains Object Storage accounts
+ and related metadata and that the
+ accounts server accesses.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>account reaper</glossterm>
+ <glossdef>
+ <para>An Object Storage worker that scans for and deletes
+ account databases and that the account server has marked
+ for deletion.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>account server</glossterm>
+ <glossdef>
+ <para>Lists containers in Object Storage and stores container
+ information in the account database.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>account service</glossterm>
+ <glossdef>
+ <para>An Object Storage component that provides account services
+ such as list, create, modify, and audit. Do not
+ confuse with OpenStack Identity Service, OpenLDAP, or
+ similar user account services.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>accounting</glossterm>
+ <glossdef>
+ <para>The Compute Service provides accounting information
+ through the event notification and system usage data
+ facilities.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ACL</glossterm>
+ <glossdef>
+ <para>See access control list.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>active/active configuration</glossterm>
+ <glossdef>
+ <para>In a high availability setup with an active/active
+ configuration, several systems share the load together
+ and if one fails, the load is distributed to the
+ remaining systems.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Active Directory</glossterm>
+ <glossdef>
+ <para>Authentication and Identity Service by
+ Microsoft, based on LDAP. Supported in
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>active/passive configuration</glossterm>
+ <glossdef>
+ <para>In a high availability setup with an
+ active/passive configuration, systems are set up to
+ bring additional resources online to replace those that
+ have failed.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>address pool</glossterm>
+ <glossdef>
+ <para>A group of fixed and/or floating IP addresses
+ that are assigned to a project and can be
+ used by or assigned to the VM instances in a
+ project.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>admin API</glossterm>
+ <glossdef>
+ <para>A subset of API calls that are accessible to
+ authorized administrators and are generally not
+ accessible to end users or the public internet,
+ can exist as a separate service (keystone) or can
+ be a subset of another API (nova).</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>admin server</glossterm>
+ <glossdef>
+ <para>In the context of the Identity Service, the worker
+ process that provides access to the admin API.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Advanced Message Queuing Protocol
+ (AMQP)</glossterm>
+ <glossdef>
+ <para>The open standard messaging protocol used by
+ OpenStack components for intra-service communications,
+ provided by RabbitMQ, Qpid, or
+ ZeroMQ.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Advanced RISC Machine (ARM)</glossterm>
+ <glossdef>
+ <para>Lower power consumption CPU often found in
+ mobile and embedded devices. Supported by
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>alert</glossterm>
+ <glossdef>
+ <para>The Compute Service can send alerts through its
+ notification system, which includes a facility to
+ create custom notification drivers. Alerts can be
+ sent to and displayed on the horizon dashboard.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>allocate</glossterm>
+ <glossdef>
+ <para>The process of taking floating IP address from
+ the address pool so it can be associated with a
+ fixed IP on a guest VM instance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Amazon Kernel Image (AKI)</glossterm>
+ <glossdef>
+ <para>Both a VM container format and disk format.
+ Supported by Image Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Amazon Machine Image (AMI)</glossterm>
+ <glossdef>
+ <para>Both a VM container format and disk format.
+ Supported by Image Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Amazon Ramdisk Image (ARI)</glossterm>
+ <glossdef>
+ <para>Both a VM container format and disk format.
+ Supported by Image Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>AMQP</glossterm>
+ <glossdef>
+ <para>Advanced Message Queue Protocol. An open
+ Internet protocol for reliably sending and
+ receiving messages. It enables building a diverse,
+ coherent messaging ecosystem.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Anvil</glossterm>
+ <glossdef>
+ <para>A project that ports the shell script-based
+ project named devstack to Python.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Apache</glossterm>
+ <glossdef>
+ <para>The Apache Software Foundation supports
+ the Apache community of open-source software
+ projects. These projects provide software products for the
+ public good.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Apache License 2.0</glossterm>
+ <glossdef>
+ <para>All OpenStack core projects are provided under
+ the terms of the Apache License 2.0
+ license.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Apache Web Server</glossterm>
+ <glossdef>
+ <para>The most common web server software currently
+ used on the Internet.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>API</glossterm>
+ <glossdef>
+ <para>Application programming interface.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>API endpoint</glossterm>
+ <glossdef>
+ <para>The daemon, worker, or service that a client
+ communicates with to access an API. API endpoints
+ can provide any number of services such as
+ authentication, sales data, performance
+ metrics, Compute VM commands, census data, and so
+ on.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>API extension</glossterm>
+ <glossdef>
+ <para>
+ Custom modules that extend some OpenStack core APIs.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>API extension plug-in</glossterm>
+ <glossdef>
+ <para>Alternative term for a Networking plug-in or
+ Networking API extension.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>API key</glossterm>
+ <glossdef>
+ <para>Alternative term for an API token.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>API server</glossterm>
+ <glossdef>
+ <para>Any node running a daemon or worker that
+ provides an API endpoint.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>API token</glossterm>
+ <glossdef>
+ <para>Passed to API requests and used by OpenStack to
+ verify that the client is authorized to run the
+ requested operation.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>API version</glossterm>
+ <glossdef>
+ <para>In OpenStack, the API version for a project is
+ part of the URL. For example,
+ <filename>example.com/nova/v1/foobar</filename>.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>applet</glossterm>
+ <glossdef>
+ <para>A Java program that can be embedded into a web
+ page.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Application Programming Interface
+ (API)</glossterm>
+ <glossdef>
+ <para>A collection of specifications used to access a
+ service, application, or program. Includes service
+ calls, required parameters for each call, and the
+ expected return values.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>application server</glossterm>
+ <glossdef>
+ <para>A piece of software that makes available another
+ piece of software over a network.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Application Service Provider (ASP)</glossterm>
+ <glossdef>
+ <para>Companies that rent specialized applications
+ that help businesses and organizations provide
+ additional services with less cost.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>arptables</glossterm>
+ <glossdef>
+ <para>Tool used for maintaining Address Resolution Protocol
+ packet filter rules in the Linux kernel firewall modules.
+ Used along with iptables, ebtables, and ip6tables in
+ Compute to provide firewall services for VMs.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>associate</glossterm>
+ <glossdef>
+ <para>The process associating a Compute floating IP
+ address with a fixed IP address.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Asynchronous JavaScript and XML
+ (AJAX)</glossterm>
+ <glossdef>
+ <para>A group of interrelated web development
+ techniques used on the client-side to create
+ asynchronous web applications. Used extensively in
+ horizon.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ATA over Ethernet (AoE)</glossterm>
+ <glossdef>
+ <para>A disk storage protocol tunneled within
+ Ethernet.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>attach</glossterm>
+ <glossdef>
+ <para>The process of connecting a VIF or vNIC to a L2
+ network in Networking. In the context of Compute, this
+ process connects a storage volume to an
+ instance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>attachment (network)</glossterm>
+ <glossdef>
+ <para>Association of an interface ID to a logical
+ port. Plugs an interface into a port.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>auditing</glossterm>
+ <glossdef>
+ <para>Provided in Compute through the system usage data
+ facility.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>auditor</glossterm>
+ <glossdef>
+ <para>A worker process that verifies the integrity
+ of Object Storage objects, containers, and accounts.
+ Auditors is the collective term for the Object Storage
+ account auditor, container auditor, and object
+ auditor.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Austin</glossterm>
+ <glossdef>
+ <para>Project name for the initial release of
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>auth node</glossterm>
+ <glossdef>
+ <para>Alternative term for an Object Storage authorization
+ node.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>authentication</glossterm>
+ <glossdef>
+ <para>The process that confirms that the user,
+ process, or client is really who they say they are
+ through private key, secret token, password,
+ fingerprint, or similar method.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>authentication token</glossterm>
+ <glossdef>
+ <para>A string of text provided to the client after
+ authentication. Must be provided by the user or
+ process in subsequent requests to the API
+ endpoint.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>AuthN</glossterm>
+ <glossdef>
+ <para>The Identity Service component that provides
+ authentication services.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>authorization</glossterm>
+ <glossdef>
+ <para>The act of verifying that a user, process, or
+ client is authorized to perform an action.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>authorization node</glossterm>
+ <glossdef>
+ <para>An Object Storage node that provides authorization
+ services.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>AuthZ</glossterm>
+ <glossdef>
+ <para>The Identity Service component that provides high-level
+ authorization services.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Auto ACK</glossterm>
+ <glossdef>
+ <para>Configuration setting within RabbitMQ that
+ enables or disables message acknowledgment.
+ Enabled by default.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>auto declare</glossterm>
+ <glossdef>
+ <para>A Compute RabbitMQ setting that determines if a
+ message exchange is automatically created when the
+ program starts.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>availability zone</glossterm>
+ <glossdef>
+ <para>An Amazon EC2 concept of an isolated area that
+ is used for fault tolerance. Do not confuse with
+ an OpenStack Compute zone or cell.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>AWS</glossterm>
+ <glossdef>
+ <para>Amazon Web Services.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .B. -->
+ <glossdiv>
+ <title>B</title>
+ <glossentry>
+ <glossterm>back-end</glossterm>
+ <glossdef>
+ <para>Interactions and processes that are obfuscated
+ from the user, such as Compute volume mount, data
+ transmission to an isCSI target by a daemon, or
+ Object Storage object integrity checks.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>back-end catalog</glossterm>
+ <glossdef>
+ <para>The storage method used by the Identity Service catalog
+ service to store and retrieve information about
+ API endpoints that are available to the client.
+ Examples include a SQL database, LDAP database, or
+ KVS back end.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>back-end store</glossterm>
+ <glossdef>
+ <para>The persistent data store used to save and
+ retrieve a information for a service, such as lists of
+ Object Storage objects, current state of guest VMs, lists
+ of user names, and so on. Also, the method that the
+ Image Service uses to get and store VM images.
+ Options include Object Storage, local file system, S3, and
+ HTTP.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>bandwidth</glossterm>
+ <glossdef>
+ <para>The amount of available data used by
+ communication resources such as the Internet.
+ Represents the amount of data that is used to
+ download things or the amount of data available to
+ download.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>bare</glossterm>
+ <glossdef>
+ <para>An Image Service container format that indicates that no
+ container exists for the VM image.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>base image</glossterm>
+ <glossdef>
+ <para>An OpenStack-provided image.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Bexar</glossterm>
+ <glossdef>
+ <para>A grouped release of projects related to
+ OpenStack that came out in February of 2011. It
+ included Compute (nova) and Object Storage (swift)
+ only.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>binary</glossterm>
+ <glossdef>
+ <para>Information that consists solely of ones and
+ zeroes, which is the language of computers.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>bit</glossterm>
+ <glossdef>
+ <para>A bit is a single digit number that is in base
+ of 2 (either a zero or one). Bandwidth usage is
+ measured in bits-per-second.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>bit-per-second (BPS)</glossterm>
+ <glossdef>
+ <para>The universal measurement of how quickly data is
+ transferred from place to place.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>block device</glossterm>
+ <glossdef>
+ <para>A device that moves data in the form of blocks.
+ These device nodes interface the devices, such as
+ hard disks, CD-ROM drives, flash drives, and other
+ addressable regions of memory.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>block migration</glossterm>
+ <glossdef>
+ <para>A method of VM live migration used by KVM to
+ evacuate instances from one host to another with
+ very little downtime during a user-initiated
+ switch-over. Does not require shared storage.
+ Supported by Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Block Storage</glossterm>
+ <glossdef>
+ <para>The OpenStack core project that enables management
+ of volumes, volume snapshots, and volume types. The
+ project name of Block Storage is cinder.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>BMC</glossterm>
+ <glossdef>
+ <para>Baseboard Management Controller. The
+ intelligence in the IPMI architecture, which is a
+ specialized micro-controller that is embedded on
+ the motherboard of a computer and acts as a
+ server. Manages the interface between system
+ management software and platform hardware.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>bootable disk image</glossterm>
+ <glossdef>
+ <para>A type of VM image that exists as a single,
+ bootable file.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Bootstrap Protocol (BOOTP)</glossterm>
+ <glossdef>
+ <para>A network protocol used by a network client to
+ obtain an IP address from a configuration server.
+ Provided in Compute through the dnsmasq daemon when
+ using either the FlatDHCP manager or VLAN manager
+ network manager.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>browser</glossterm>
+ <glossdef>
+ <para>Any client software that enables a computer or
+ device to access the Internet.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>builder file</glossterm>
+ <glossdef>
+ <para>Contains configuration information that Object
+ Storage uses to reconfigure a ring or recreate it from
+ scratch after a serious failure.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>button class</glossterm>
+ <glossdef>
+ <para>A group of related button types within horizon.
+ Buttons to start, stop, and suspend VMs are in one
+ class. Buttons to associate and disassociate
+ floating IP addresses are in another class, and so
+ on.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>byte</glossterm>
+ <glossdef>
+ <para>Set of bits that make up a single character;
+ there are usually 8 bits to a byte.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .C. -->
+ <glossdiv>
+ <title>C</title>
+ <glossentry>
+ <glossterm>CA</glossterm>
+ <glossdef>
+ <para>Certificate Authority or Certification
+ Authority. In cryptography, an entity that issues
+ digital certificates. The digital certificate
+ certifies the ownership of a public key by the
+ named subject of the certificate. This enables
+ others (relying parties) to rely upon signatures
+ or assertions made by the private key that
+ corresponds to the certified public key. In this
+ model of trust relationships, a CA is a trusted
+ third party for both the subject (owner) of the
+ certificate and the party relying upon the
+ certificate. CAs are characteristic of many public
+ key infrastructure (PKI) schemes.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>cache pruner</glossterm>
+ <glossdef>
+ <para>A program that keeps the Image Service VM image
+ cache at or below its configured maximum size.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Cactus</glossterm>
+ <glossdef>
+ <para>An OpenStack grouped release of projects that
+ came out in the spring of 2011. It included
+ Compute (nova), Object Storage (swift), and the
+ Image service (glance).</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>CALL</glossterm>
+ <glossdef>
+ <para>One of the RPC primitives used by the OpenStack
+ message queue software. Sends a message and waits
+ for a response.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>capability</glossterm>
+ <glossdef>
+ <para>Defines resources for a cell, including CPU,
+ storage, and networking. Can apply to the specific
+ services within a cell or a whole cell.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>capacity cache</glossterm>
+ <glossdef>
+ <para>A Compute back end database table that contains
+ the current workload, amount of free RAM,
+ number of VMs running on each host. Used to
+ determine on which VM a host starts.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>capacity updater</glossterm>
+ <glossdef>
+ <para>A notification driver that monitors VM instances
+ and updates the capacity cache as needed.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>CAST</glossterm>
+ <glossdef>
+ <para>One of the RPC primitives used by the OpenStack
+ message queue software. Sends a message and does
+ not wait for a response.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>catalog</glossterm>
+ <glossdef>
+ <para>
+ A list of API endpoints that are available to a user
+ after authentication with the Identity Service.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>catalog service</glossterm>
+ <glossdef>
+ <para>
+ An Identity Service service that lists API endpoints
+ that are available to a user after authentication
+ with the Identity Service.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ceilometer</glossterm>
+ <glossdef>
+ <para>The project name for the Telemetry service, which
+ is an integrated project that provides metering and
+ measuring facilities for OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>cell</glossterm>
+ <glossdef>
+ <para>Provides logical partitioning of Compute resources
+ in a child and parent relationship. Requests are
+ passed from parent cells to child cells if the
+ parent cannot provide the requested
+ resource.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>cell forwarding</glossterm>
+ <glossdef>
+ <para>A Compute option that enables parent cells to pass
+ resource requests to child cells if the parent
+ cannot provide the requested resource.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>cell manager</glossterm>
+ <glossdef>
+ <para>The Compute component that contains a list of the
+ current capabilities of each host within the cell
+ and routes requests as appropriate.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>CentOS</glossterm>
+ <glossdef>
+ <para>A Linux distribution that is compatible with
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Ceph</glossterm>
+ <glossdef>
+ <para>Massively scalable distributed storage system
+ that consists of an object store, block store, and
+ POSIX-compatible distributed file system.
+ Compatible with OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>CephFS</glossterm>
+ <glossdef>
+ <para>The POSIX-compliant file system provided by
+ Ceph.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>certificate authority</glossterm>
+ <glossdef>
+ <para>A simple certificate authority provided by Compute
+ for cloudpipe VPNs and VM image decryption.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Challenge-Handshake Authentication Protocol
+ (CHAP)</glossterm>
+ <glossdef>
+ <para>An iSCSI authentication method supported by
+ Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>chance scheduler</glossterm>
+ <glossdef>
+ <para>A scheduling method used by Compute that randomly
+ chooses an available host from the pool.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>changes since</glossterm>
+ <glossdef>
+ <para>A Compute API parameter that downloads
+ changes to the requested item since your last
+ request, instead of downloading a new, fresh set
+ of data and comparing it against the old
+ data.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Chef</glossterm>
+ <glossdef>
+ <para>An operating system configuration management
+ tool supporting OpenStack deployments.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>child cell</glossterm>
+ <glossdef>
+ <para>If a requested resource such as CPU time, disk
+ storage, or memory is not available in the parent
+ cell, the request is forwarded to its associated
+ child cells. If the child cell can fulfill the
+ request, it does. Otherwise, it attempts to pass
+ the request to any of its children.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>cinder</glossterm>
+ <glossdef>
+ <para>A core OpenStack project that provides block
+ storage services for VMs.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Cisco neutron plug-in</glossterm>
+ <glossdef>
+ <para>A Networking plug-in for Cisco devices and
+ technologies including UCS and Nexus.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>cloud architect</glossterm>
+ <glossdef>
+ <para>A person who plans, designs, and oversees the
+ creation of clouds.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>cloud computing</glossterm>
+ <glossdef>
+ <para>A model that enables access to a shared pool of
+ configurable computing resources, such as
+ networks, servers, storage, applications, and
+ services, that can be rapidly provisioned and
+ released with minimal management effort or service
+ provider interaction.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>cloud controller</glossterm>
+ <glossdef>
+ <para>Collection of Compute components that represent the
+ global state of the cloud, talks to services such
+ as Identity Service authentication, Object Storage,
+ and node/storage workers through a queue.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>cloud controller node</glossterm>
+ <glossdef>
+ <para>A node that runs network, volume, API, scheduler
+ and image services. Each service may be broken out
+ into separate nodes for scalability or
+ availability.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Cloud Data Management Interface
+ (CDMI)</glossterm>
+ <glossdef>
+ <para>SINA standard that defines a RESTful API for
+ managing objects in the cloud, currently
+ unsupported in OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Cloud Infrastructure Management Interface
+ (CIMI)</glossterm>
+ <glossdef>
+ <para>An in-progress specification for cloud
+ management. Currently unsupported in
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>cloud-init</glossterm>
+ <glossdef>
+ <para>A package commonly installed in VM images that
+ performs initialization of an instance after boot
+ using information that it retrieves from the
+ metadata service such as the SSH public key and
+ user data.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>cloudadmin</glossterm>
+ <glossdef>
+ <para>One of the default roles in the Compute RBAC
+ system. Grants complete system access.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>cloudpipe</glossterm>
+ <glossdef>
+ <para>A Compute service that creates VPNs on a
+ per-project basis.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>cloudpipe image</glossterm>
+ <glossdef>
+ <para>A pre-made VM image that serves as a cloudpipe
+ server. Essentially, OpenVPN running on
+ Linux.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>CMDB</glossterm>
+ <glossdef>
+ <para>Configuration Management Database.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>command filter</glossterm>
+ <glossdef>
+ <para>Lists allowed commands within the Compute rootwrap
+ facility.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>community project</glossterm>
+ <glossdef>
+ <para>A project that is not officially endorsed by the
+ OpenStack Foundation. If the project is successful
+ enough, it might be elevated to an incubated
+ project and then to a core project, or it might be
+ merged with the main code trunk.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>compression</glossterm>
+ <glossdef>
+ <para>Reduce the size of files by special encoding, the file
+ can be decompressed again to its original content.
+ OpenStack supports compression at the Linux file
+ system level but does not support compression for
+ things such as Object Storage objects or Image Service VM
+ images.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Compute</glossterm>
+ <glossdef>
+ <para>The OpenStack core project that provides compute
+ services. The project name of the Compute Service is nova.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Compute API</glossterm>
+ <glossdef>
+ <para>The <systemitem class="service">nova-api</systemitem>
+ daemon provides
+ access to nova services. Can communicate with
+ other APIs, such as the Amazon EC2 API.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>compute controller</glossterm>
+ <glossdef>
+ <para>The Compute component that chooses suitable hosts
+ on which to start VM instances.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>compute host</glossterm>
+ <glossdef>
+ <para>Physical host dedicated to running compute
+ nodes.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>compute node</glossterm>
+ <glossdef>
+ <para>A node that runs the <systemitem class="service">nova-compute</systemitem> daemon, a VM
+ instance that provides a wide range of services
+ such as a web services and analytics.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>compute service</glossterm>
+ <glossdef>
+ <para>Name for the Compute component that
+ manages VMs.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>compute worker</glossterm>
+ <glossdef>
+ <para>The Compute component that runs on each compute
+ node and manages the VM instance life cycle,
+ including run, reboot, terminate, attach/detach
+ volumes, and so on. Provided by the
+ <systemitem class="service">nova-compute</systemitem>
+ daemon.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>concatenated object</glossterm>
+ <glossdef>
+ <para>A set of segment objects that Object Storage combines
+ and sends to the client.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>conductor</glossterm>
+ <glossdef>
+ <para>In Compute, conductor is the process that proxies
+ database requests from the compute process. Using
+ conductor improves security as compute nodes do not
+ need direct access to the database.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>consistency window</glossterm>
+ <glossdef>
+ <para>The amount of time it takes for a new Object Storage
+ object to become accessible to all clients.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>console log</glossterm>
+ <glossdef>
+ <para>Contains the output from a Linux VM console in
+ Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>container</glossterm>
+ <glossdef>
+ <para>Organizes and stores objects in Object Storage.
+ Similar to the concept of a Linux directory but
+ cannot be nested. Alternative term for an Image Service
+ container format.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>container auditor</glossterm>
+ <glossdef>
+ <para>Checks for missing replicas or incorrect objects
+ in specified Object Storage containers through queries
+ to the SQLite back-end database.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>container database</glossterm>
+ <glossdef>
+ <para>
+ A SQLite database that stores Object Storage
+ containers and container metadata. The container
+ server accesses this database.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>container format</glossterm>
+ <glossdef>
+ <para>
+ A wrapper used by the Image Service that contains a
+ VM image and its associated metadata, such as
+ machine state, OS disk size, and so on.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>container server</glossterm>
+ <glossdef>
+ <para>An Object Storage server that manages containers.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>container service</glossterm>
+ <glossdef>
+ <para>The Object Storage component that provides container
+ services, such as create, delete, list, and so
+ on.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>controller node</glossterm>
+ <glossdef>
+ <para>Alternative term for a cloud controller
+ node.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>core API</glossterm>
+ <glossdef>
+ <para>Depending on context, the core API is either the
+ OpenStack API or the main API of a specific core
+ project, such as Compute, Networking, Image Service,
+ and so on.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>core project</glossterm>
+ <glossdef>
+ <para>An official OpenStack project. Currently consists of Compute (nova), Object
+ Storage (swift), Image Service (glance), Identity (keystone), Dashboard
+ (horizon), Networking (neutron), and Block Storage (cinder). The Telemetry
+ module (ceilometer) and Orchestration module (heat) are integrated projects as
+ of the Havana release. In the Icehouse release, the Database module (trove)
+ gains integrated project status.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>cost</glossterm>
+ <glossdef>
+ <para>Under the Compute distributed scheduler this is
+ calculated by looking at the capabilities of each
+ host relative to the flavor of the VM instance
+ being requested.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>credentials</glossterm>
+ <glossdef>
+ <para>Data that is only known to or accessible by a
+ user that is used to verify the user is who they
+ say they are and presented to the server during
+ authentication. Examples include a password,
+ secret key, digital certificate, fingerprint, and
+ so on.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Crowbar</glossterm>
+ <glossdef>
+ <para>An open source community project by Dell that
+ aims to provide all necessary services to quickly
+ deploy clouds.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>current workload</glossterm>
+ <glossdef>
+ <para>An element of the Compute capacity cache that is
+ calculated based on the number of build, snapshot,
+ migrate, and resize operations currently in
+ progress on a given host.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>customer</glossterm>
+ <glossdef>
+ <para>Alternative term for tenant.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>customization module</glossterm>
+ <glossdef>
+ <para>A user-created Python module that is loaded by
+ horizon to change the look and feel of the
+ dashboard.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .D. -->
+ <glossdiv>
+ <title>D</title>
+ <glossentry>
+ <glossterm>daemon</glossterm>
+ <glossdef>
+ <para>A process that runs in the background and waits
+ for requests. May or may not listen on a TCP or
+ UDP port. Do not confuse with a worker.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>DAC</glossterm>
+ <glossdef>
+ <para>Discretionary access control. Governs the
+ ability of subjects to access objects, while
+ enabling users to make policy decisions and assign
+ security attributes. The traditional UNIX system
+ of users, groups, and read-write-execute
+ permissions is an example of DAC.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>dashboard</glossterm>
+ <glossdef>
+ <para>The web-based management interface for
+ OpenStack. An alternative name for horizon.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>data encryption</glossterm>
+ <glossdef>
+ <para>Both Image Service and Compute support encrypted virtual
+ machine (VM) images (but not instances).
+ In-transit data encryption is supported in
+ OpenStack using technologies such as HTTPS, SSL,
+ TLS, and SSH. Object Storage does not support object
+ encryption at the application level but may support storage
+ that uses disk encryption.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>database ID</glossterm>
+ <glossdef>
+ <para>A unique ID given to each replica of an Object Storage
+ database.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>database replicator</glossterm>
+ <glossdef>
+ <para>An Object Storage component that copies changes in the
+ account, container, and object databases to other
+ nodes.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>deallocate</glossterm>
+ <glossdef>
+ <para>The process of removing the association between
+ a floating IP address and a fixed IP address.
+ Once this association is removed, the floating IP
+ returns to the address pool.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Debian</glossterm>
+ <glossdef>
+ <para>A Linux distribution that is compatible with
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>deduplication</glossterm>
+ <glossdef>
+ <para>The process of finding duplicate data at the
+ disk block, file, and/or object level to minimize
+ storage use, currently unsupported within
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>default panel</glossterm>
+ <glossdef>
+ <para>The default panel that is displayed when a user
+ accesses the horizon dashboard.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>default tenant</glossterm>
+ <glossdef>
+ <para>New users are assigned to this tenant
+ if no tenant is specified when a user is
+ created.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>default token</glossterm>
+ <glossdef>
+ <para>An Identity Service token that is not associated with a
+ specific tenant and is exchanged for a scoped
+ token.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>delayed delete</glossterm>
+ <glossdef>
+ <para>An option within Image Service so that rather than
+ immediately delete an image, it is deleted after a
+ pre-defined number of seconds.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>delivery mode</glossterm>
+ <glossdef>
+ <para>Setting for the Compute RabbitMQ message delivery
+ mode, can be set to either transient or
+ persistent.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>deprecated auth</glossterm>
+ <glossdef>
+ <para>An option within Compute that enables administrators
+ to create and manage users through the
+ <command>nova-manage</command>
+ command as opposed to using the Identity Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>developer</glossterm>
+ <glossdef>
+ <para>One of the default roles in the Compute RBAC system
+ and is the default role assigned to a new
+ user.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>device ID</glossterm>
+ <glossdef>
+ <para>Maps Object Storage partitions to physical storage
+ devices.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>device weight</glossterm>
+ <glossdef>
+ <para>
+ Distributes partitions proportionately across
+ Object Storage devices based on the storage
+ capacity of each device.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>DevStack</glossterm>
+ <glossdef>
+ <para>Community project that uses shell scripts to
+ quickly build complete OpenStack development
+ environments.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>DHCP</glossterm>
+ <glossdef>
+ <para>Dynamic Host Configuration Protocol. A network
+ protocol that configures devices that are
+ connected to a network so they can communicate on
+ that network by using the Internet Protocol (IP).
+ The protocol is implemented in a client-server
+ model where DHCP clients request configuration
+ data such as, an IP address, a default route, and
+ one or more DNS server addresses from a DHCP
+ server.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Diablo</glossterm>
+ <glossdef>
+ <para>A grouped release of projects related to
+ OpenStack that came out in the fall of 2011, the
+ fourth release of OpenStack. It included Compute
+ (nova 2011.3), Object Storage (swift 1.4.3), and
+ the Image service (glance).</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>direct consumer</glossterm>
+ <glossdef>
+ <para>An element of the Compute RabbitMQ that comes to
+ life when a RPC call is executed. It connects to a
+ direct exchange through a unique exclusive queue,
+ sends the message, and terminates.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>direct exchange</glossterm>
+ <glossdef>
+ <para>A routing table that is created within the Compute
+ RabbitMQ during RPC calls, one is created for each
+ RPC call that is invoked.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>direct publisher</glossterm>
+ <glossdef>
+ <para>Element of RabbitMQ that provides a response to
+ an incoming MQ message.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>disassociate</glossterm>
+ <glossdef>
+ <para>The process of removing the association between
+ a floating IP address and fixed IP and thus
+ returning the floating IP address to the address
+ pool.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>disk encryption</glossterm>
+ <glossdef>
+ <para>The ability to encrypt data at the file system,
+ disk partition or whole disk level. Supported
+ within Compute VMs.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>disk format</glossterm>
+ <glossdef>
+ <para>The underlying format that a disk image for a VM
+ is stored as within the Image Service back-end store. For
+ example, AMI, ISO, QCOW2, VMDK, and so on.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>dispersion</glossterm>
+ <glossdef>
+ <para>In Object Storage, tools to test and ensure dispersion of
+ objects and containers to ensure fault
+ tolerance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Django</glossterm>
+ <glossdef>
+ <para>A web framework used extensively in
+ horizon.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>DNS</glossterm>
+ <glossdef>
+ <para>Domain Name Server. A hierarchical and
+ distributed naming system for computers, services,
+ and resources connected to the Internet or a
+ private network. Associates a human-friendly names
+ to IP addresses.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>DNS record</glossterm>
+ <glossdef>
+ <para>A record that specifies information about a
+ particular domain and belongs to the
+ domain.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>dnsmasq</glossterm>
+ <glossdef>
+ <para>Daemon that provides DNS, DHCP, BOOTP, and TFTP
+ services, used by the Compute VLAN manager and
+ FlatDHCP manager.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>domain</glossterm>
+ <glossdef>
+ <para>Separates a web site from other sites. Often,
+ the domain name has two or more parts that are
+ separated by dots. For example, yahoo.com,
+ usa.gov, Harvard.edu, or mail.yahoo.com.</para>
+ <para>A domain is an entity or container of all
+ DNS-related information containing one or more
+ records.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Domain Name Service (DNS)</glossterm>
+ <glossdef>
+ <para>In Compute, the support that enables associating
+ DNS entries with floating IP addresses, nodes, or
+ cells so host names are consistent across
+ reboots.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Domain Name System (DNS)</glossterm>
+ <glossdef>
+ <para>A system by which Internet domain
+ name-to-address and address-to-name resolutions
+ are determined.</para>
+ <para>DNS helps navigate the Internet by translating
+ the IP address into an address that is easier to
+ remember For example, translating 111.111.111.1
+ into www.yahoo.com.</para>
+ <para>All domains and their components, such as mail
+ servers, utilize DNS to resolve to the appropriate
+ locations. DNS servers are usually set up in a
+ master-slave relationship such that failure of the
+ master invokes the slave. DNS servers might also
+ be clustered or replicated such that changes made
+ to one DNS server are automatically propagated to
+ other active servers.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>download</glossterm>
+ <glossdef>
+ <para>The transfer of data, usually in the form of
+ files, from one computer to another.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>DRTM</glossterm>
+ <glossdef>
+ <para>Dynamic root of trust measurement.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>durable exchange</glossterm>
+ <glossdef>
+ <para>The Compute RabbitMQ message exchange that remains
+ active when the server restarts.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>durable queue</glossterm>
+ <glossdef>
+ <para>A Compute RabbitMQ message queue that remains
+ active when the server restarts.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Dynamic Host Configuration Protocol
+ (DHCP)</glossterm>
+ <glossdef>
+ <para>A method to automatically configure networking
+ for a host at boot time. Provided by both Networking
+ and Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Dynamic HyperText Markup Language
+ (DHTML)</glossterm>
+ <glossdef>
+ <para>Pages that use HTML,
+ JavaScript, and CCS to enable users to interact
+ with a web page or show simple animation.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .E. -->
+ <glossdiv>
+ <title>E</title>
+ <glossentry>
+ <glossterm>EBS boot volume</glossterm>
+ <glossdef>
+ <para>An Amazon EBS storage volume that contains a
+ bootable VM image, currently unsupported in
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ebtables</glossterm>
+ <glossdef>
+ <para>Used in Compute along with arptables, iptables, and
+ ip6tables to create firewalls and to ensure
+ isolation of network communications.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>EC2</glossterm>
+ <glossdef>
+ <para>The Amazon commercial compute product, similar
+ to Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>EC2 access key</glossterm>
+ <glossdef>
+ <para>Used along with an EC2 secret key to access the
+ Compute EC2 API.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>EC2 API</glossterm>
+ <glossdef>
+ <para>OpenStack supports accessing the Amazon EC2 API
+ through Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>EC2 Compatibility API</glossterm>
+ <glossdef>
+ <para>A Compute component that enables OpenStack to
+ communicate with Amazon EC2.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>EC2 secret key</glossterm>
+ <glossdef>
+ <para>Used along with an EC2 access key when
+ communicating with the Compute EC2 API, is used to
+ digitally sign each request.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Elastic Block Storage (EBS)</glossterm>
+ <glossdef>
+ <para>The Amazon commercial block storage
+ product.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>encryption</glossterm>
+ <glossdef>
+ <para>OpenStack supports encryption technologies such
+ as HTTPS, SSH, SSL, TLS, digital certificates, and
+ data encryption.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>endpoint</glossterm>
+ <glossdef>
+ <para>See API endpoint.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>endpoint registry</glossterm>
+ <glossdef>
+ <para>Alternative term for an Identity Service catalog.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>endpoint template</glossterm>
+ <glossdef>
+ <para>A list of URL and port number endpoints that
+ indicate where a service, such as object storage,
+ compute, identity, and so on, can be
+ accessed.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>entity</glossterm>
+ <glossdef>
+ <para>Any piece of hardware or software that wants to
+ connect to the network services provided by
+ Networking, the Network Connectivity service. An
+ entity can make use of Networking by implementing a
+ VIF.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ephemeral image</glossterm>
+ <glossdef>
+ <para>A VM image that does not save changes made to
+ its volumes and reverts them to their original
+ state after the instance is terminated.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ephemeral volume</glossterm>
+ <glossdef>
+ <para>Volume that does not save the changes made to it
+ and reverts to its original state when the current
+ user relinquishes control.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Essex</glossterm>
+ <glossdef>
+ <para>A grouped release of projects related to
+ OpenStack that came out in April 2012, the fifth
+ release of OpenStack. It included Compute (nova
+ 2012.1), Object Storage (swift 1.4.8), Image
+ (glance), Identity (keystone), and Dashboard
+ (horizon).</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ESX</glossterm>
+ <glossdef>
+ <para>An OpenStack-supported hypervisor.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ESXi</glossterm>
+ <glossdef>
+ <para>An OpenStack-supported hypervisor.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ebtables</glossterm>
+ <glossdef>
+ <para>Filtering tool for a Linux bridging firewall, enabling
+ filtering of network traffic passing through a Linux bridge.
+ Used to restrict communications between hosts and/or nodes
+ in OpenStack Compute along with iptables, arptables, and
+ ip6tables.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ETag</glossterm>
+ <glossdef>
+ <para>MD5 hash of an object within Object Storage, used to
+ ensure data integrity.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>euca2ools</glossterm>
+ <glossdef>
+ <para>A collection of command line tools for
+ administering VMs, most are compatible with
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Eucalyptus Kernel Image (EKI)</glossterm>
+ <glossdef>
+ <para>Used along with an ERI to create an EMI.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Eucalyptus Machine Image (EMI)</glossterm>
+ <glossdef>
+ <para>VM image container format supported by
+ Image Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Eucalyptus Ramdisk Image (ERI)</glossterm>
+ <glossdef>
+ <para>Used along with an EKI to create an EMI.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>evacuate</glossterm>
+ <glossdef>
+ <para>The process of migrating one or all virtual
+ machine (VM) instances from one host to another,
+ compatible with both shared storage live migration
+ and block migration.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>exchange</glossterm>
+ <glossdef>
+ <para>Alternative term for a RabbitMQ message
+ exchange.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>exchange type</glossterm>
+ <glossdef>
+ <para>A routing algorithm in the Compute RabbitMQ.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>exclusive queue</glossterm>
+ <glossdef>
+ <para>Connected to by a direct consumer in RabbitMQ /
+ Compute, the message can only be consumed by the
+ current connection.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>extended attributes (xattrs)</glossterm>
+ <glossdef>
+ <para>File system option that enables storage of
+ additional information beyond owner, group,
+ permissions, modification time, and so on. The
+ underlying Object Storage file system must support extended
+ attributes.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>extension</glossterm>
+ <glossdef>
+ <para>Alternative term for a Compute API extension or
+ plug-in. In the context of Identity Service this is a call
+ that is specific to the implementation, such as
+ adding support for OpenID.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>extra specs</glossterm>
+ <glossdef>
+ <para>Specifies additional requirements
+ when Compute determines where to start a new
+ instance. Examples include a minimum amount of
+ network bandwidth or a GPU.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .F. -->
+ <glossdiv>
+ <title>F</title>
+ <glossentry>
+ <glossterm>FakeLDAP</glossterm>
+ <glossdef>
+ <para>An easy method to create a local LDAP directory
+ for testing Identity Service and Compute. Requires
+ Redis.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>fan-out exchange</glossterm>
+ <glossdef>
+ <para>Within RabbitMQ and Compute it is the messaging
+ interface that is used by the scheduler service to
+ receive capability messages from the compute,
+ volume, and network nodes.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Fedora</glossterm>
+ <glossdef>
+ <para>A Linux distribution compatible with
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Fibre Channel</glossterm>
+ <glossdef>
+ <para>Storage protocol similar in concept to TCP/IP,
+ encapsulates SCSI commands and data.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Fibre Channel over Ethernet (FCoE)</glossterm>
+ <glossdef>
+ <para>The fibre channel protocol tunneled within
+ Ethernet.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>fill-first scheduler</glossterm>
+ <glossdef>
+ <para>The Compute scheduling method that attempts to fill
+ a host with VMs rather than starting new VMs on a
+ variety of hosts.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>filter</glossterm>
+ <glossdef>
+ <para>The step in the Compute scheduling process when
+ hosts that cannot run VMs are eliminated and not
+ chosen.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>firewall</glossterm>
+ <glossdef>
+ <para>Used to restrict communications between hosts
+ and/or nodes, implemented in Compute using iptables,
+ arptables, ip6tables and etables.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>fixed IP address</glossterm>
+ <glossdef>
+ <para>An IP address that is associated with the same
+ instance each time that instance boots, generally
+ not accessible to end users or the public
+ internet, used for management of the
+ instance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Flat Manager</glossterm>
+ <glossdef>
+ <para>The Compute component that gives IP addresses to
+ authorized nodes and assumes DHCP, DNS, and
+ routing configuration and services are provided by
+ something else.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>flat mode injection</glossterm>
+ <glossdef>
+ <para>A Compute networking method where the OS network
+ configuration information is injected into the VM
+ image before the instance starts.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>flat network</glossterm>
+ <glossdef>
+ <para>The Network Controller provides virtual networks
+ to enable compute servers to interact with each
+ other and with the public network. All machines
+ must have a public and private network interface.
+ A flat network is a private network interface,
+ which is controlled by the flat_interface option
+ with flat managers.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>FlatDHCP Manager</glossterm>
+ <glossdef>
+ <para>The Compute component that provides dnsmasq (DHCP,
+ DNS, BOOTP, TFTP) and radvd (routing)
+ services.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>flavor</glossterm>
+ <glossdef>
+ <para>Alternative term for a VM instance type.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>flavor ID</glossterm>
+ <glossdef>
+ <para>UUID for each Compute or Image Service VM flavor or
+ instance type.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>floating IP address</glossterm>
+ <glossdef>
+ <para>An IP address that a project can associate
+ with a VM so the instance has the same public IP
+ address each time that it boots. You create a pool
+ of floating IP addresses and assign them to
+ instances as they are launched to maintain a
+ consistent IP address for maintaining DNS
+ assignment.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Folsom</glossterm>
+ <glossdef>
+ <para>A grouped release of projects related to
+ OpenStack that came out in the fall of 2012, the
+ sixth release of OpenStack. It includes Compute
+ (nova), Object Storage (swift), Identity
+ (keystone), Networking (neutron), Image service
+ (glance) and Volumes or Block Storage
+ (cinder).</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>FormPost</glossterm>
+ <glossdef>
+ <para>Object Storage middleware that uploads
+ (posts) an image through a form on a web
+ page.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>front-end</glossterm>
+ <glossdef>
+ <para>The point where a user interacts with a service,
+ can be an API endpoint, the horizon dashboard, or
+ a command line tool.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .G. -->
+ <glossdiv>
+ <title>G</title>
+ <glossentry>
+ <glossterm>gateway</glossterm>
+ <glossdef>
+ <para>Hardware or software that translates between two
+ different protocols.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>glance</glossterm>
+ <glossdef>
+ <para>A core project that provides the OpenStack Image
+ Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>glance API server</glossterm>
+ <glossdef>
+ <para>Processes client requests for VMs, updates
+ Image Service metadata on the registry server, and
+ communicates with the store adapter to upload VM
+ images from the back-end store.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>glance registry</glossterm>
+ <glossdef>
+ <para>Alternative term for the Image Service image
+ registry.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>global endpoint template</glossterm>
+ <glossdef>
+ <para>The Identity Service endpoint template that contains
+ services available to all tenants.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>GlusterFS</glossterm>
+ <glossdef>
+ <para>A file system designed to aggregate NAS hosts,
+ compatible with OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>golden image</glossterm>
+ <glossdef>
+ <para>A method of operating system installation where
+ a finalized disk image is created and then used by
+ all nodes without modification.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Graphic Interchange Format (GIF)</glossterm>
+ <glossdef>
+ <para>A type of image file that is commonly used for
+ animated images on web pages.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Graphics Processing Unit (GPU)</glossterm>
+ <glossdef>
+ <para>Choosing a host based on the existence of a GPU
+ is currently unsupported in OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Green Threads</glossterm>
+ <glossdef>
+ <para>The cooperative threading model used by Python,
+ reduces race conditions, and only context switches
+ when specific library calls are made. Each
+ OpenStack service is its own thread.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Grizzly</glossterm>
+ <glossdef>
+ <para>Project name for the seventh release of
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>guest OS</glossterm>
+ <glossdef>
+ <para>An operating system instance running under the
+ control of a hypervisor.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .H. -->
+ <glossdiv>
+ <title>H</title>
+ <glossentry>
+ <glossterm>Hadoop</glossterm>
+ <glossdef>
+ <para>Apache Hadoop is an open-source software
+ framework that supports data-intensive distributed
+ applications.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>handover</glossterm>
+ <glossdef>
+ <para>An object state in Object Storage where a new replica of
+ the object is automatically created due to a drive
+ failure.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>hard reboot</glossterm>
+ <glossdef>
+ <para>A type of reboot where a physical or virtual
+ power button is pressed as opposed to a graceful,
+ proper shutdown of the operating system.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Havana</glossterm>
+ <glossdef>
+ <para>Project name for the eighth release of
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>heat</glossterm>
+ <glossdef>
+ <para>An integrated project that aims to orchestrate
+ multiple cloud applications for OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>horizon</glossterm>
+ <glossdef>
+ <para>OpenStack project that provides a dashboard,
+ which is a web interface.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>horizon plug-in</glossterm>
+ <glossdef>
+ <para>A plug-in for the OpenStack dashboard
+ (horizon).</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>host</glossterm>
+ <glossdef>
+ <para>A physical computer, not a VM instance
+ (node).</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>host aggregate</glossterm>
+ <glossdef>
+ <para>A method to further subdivide availability zones
+ into hypervisor pools, a collection of common
+ hosts.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Host Bus Adapter (HBA)</glossterm>
+ <glossdef>
+ <para>Device plugged into a PCI slot such as a fibre
+ channel or network card.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>HTTP</glossterm>
+ <glossdef>
+ <para>Hypertext Transfer Protocol. HTTP is an
+ application protocol for distributed,
+ collaborative, hypermedia information systems. It
+ is the foundation of data communication for the
+ World Wide Web. Hypertext is structured text that
+ uses logical links (hyper links) between nodes
+ containing text. HTTP is the protocol to exchange
+ or transfer hypertext.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>HTTPS</glossterm>
+ <glossdef>
+ <para>Hypertext Transfer Protocol Secure (HTTPS) is a
+ communications protocol for secure communication
+ over a computer network, with especially wide
+ deployment on the Internet. Technically, it is not
+ a protocol in and of itself; rather, it is the
+ result of simply layering the Hypertext Transfer
+ Protocol (HTTP) on top of the SSL/TLS protocol,
+ thus adding the security capabilities of SSL/TLS
+ to standard HTTP communications.</para>
+ </glossdef>
+ </glossentry>
+
+ <glossentry>
+ <glossterm>Hyper-V</glossterm>
+ <glossdef>
+ <para>One of the hypervisors supported by
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>hyper link</glossterm>
+ <glossdef>
+ <para>Any kind of text that contains a link to some
+ other site, commonly found in documents where
+ clicking on a word or words opens up a different
+ web site.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>HyperText Transfer Protocol (HTTP)</glossterm>
+ <glossdef>
+ <para>The protocol that tells browsers where to go to
+ find information.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Hypertext Transfer Protocol Secure
+ (HTTPS)</glossterm>
+ <glossdef>
+ <para>Encrypted HTTP communications using SSL or TLS,
+ most OpenStack API endpoints and many
+ inter-component communications support HTTPS
+ communication.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>hypervisor</glossterm>
+ <glossdef>
+ <para>Software that arbitrates and controls VM access
+ to the actual underlying hardware.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>hypervisor pool</glossterm>
+ <glossdef>
+ <para>A collection of hypervisors grouped together
+ through host aggregates.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .I. -->
+ <glossdiv>
+ <title>I</title>
+ <glossentry>
+ <glossterm>IaaS</glossterm>
+ <glossdef>
+ <para>Infrastructure as a Service. IaaS is a provision
+ model in which an organization outsources the
+ equipment used to support operations, including
+ storage, hardware, servers and networking
+ components. The service provider owns the
+ equipment and is responsible for housing, running
+ and maintaining it. The client typically pays on a
+ per-use basis. IaaS is a model for providing cloud
+ services.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Icehouse</glossterm>
+ <glossdef>
+ <para>Project name for the ninth release of OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ID number</glossterm>
+ <glossdef>
+ <para>Unique numeric ID associated with each user in
+ Identity Service, conceptually similar to a Linux or LDAP
+ UID.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Identity API</glossterm>
+ <glossdef>
+ <para>Alternative term for the Identity Service
+ API.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Identity back-end</glossterm>
+ <glossdef>
+ <para>The source used by Identity Service to retrieve user
+ information an OpenLDAP server for example.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Identity Service</glossterm>
+ <glossdef>
+ <para>The OpenStack core project that provides a
+ central directory of users mapped to the OpenStack
+ services they can access. It also registers endpoints
+ for OpenStack services. It acts as a common
+ authentication system. The project name of the
+ Identity Service is keystone.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Identity Service API</glossterm>
+ <glossdef>
+ <para>The API used to access the OpenStack Identity
+ Service provided through keystone.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>IDS</glossterm>
+ <glossdef>
+ <para>Intrusion Detection System</para>
+ </glossdef>
+ </glossentry>
+
+ <glossentry>
+ <glossterm>image</glossterm>
+ <glossdef>
+ <para>A collection of files for a specific operating
+ system (OS) that you use to create or rebuild a
+ server. OpenStack provides pre-built images. You
+ can also create custom images, or snapshots, from
+ servers that you have launched. Custom images can
+ be used for data backups or as "gold" images for
+ additional servers.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Image API</glossterm>
+ <glossdef>
+ <para>The Image Service API endpoint for management of VM
+ images.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>image cache</glossterm>
+ <glossdef>
+ <para>Used by Image Service to obtain images on the local host
+ rather than re-downloading them from
+ the image server each time one is
+ requested.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>image ID</glossterm>
+ <glossdef>
+ <para>Combination of URI and UUID used to access
+ Image Service VM images through the image API.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>image membership</glossterm>
+ <glossdef>
+ <para>A list of tenants that can access a given VM
+ image within Image Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>image owner</glossterm>
+ <glossdef>
+ <para>The tenant who owns an Image Service virtual
+ machine image.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>image registry</glossterm>
+ <glossdef>
+ <para>A list of VM images that are available through
+ Image Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Image Service</glossterm>
+ <glossdef>
+ <para>An OpenStack core project that provides
+ discovery, registration, and delivery services for disk
+ and server images. The project name of the Image
+ Service is glance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Image Service API</glossterm>
+ <glossdef>
+ <para>Alternative name for the glance image
+ API.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>image status</glossterm>
+ <glossdef>
+ <para>The current status of a VM image in Image Service, not
+ to be confused with the status of a running
+ instance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>image store</glossterm>
+ <glossdef>
+ <para>The back-end store used by Image Service to store VM
+ images, options include Object Storage, local file system,
+ S3, or HTTP.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>image UUID</glossterm>
+ <glossdef>
+ <para>UUID used by Image Service to uniquely identify each VM
+ image.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>incubated project</glossterm>
+ <glossdef>
+ <para>A community project may be elevated to this
+ status and is then promoted to a core
+ project.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ingress filtering</glossterm>
+ <glossdef>
+ <para>The process of filtering incoming network
+ traffic. Supported by Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>injection</glossterm>
+ <glossdef>
+ <para>The process of putting a file into a virtual
+ machine image before the instance is
+ started.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>instance</glossterm>
+ <glossdef>
+ <para>A running VM, or a VM in a known state such as
+ suspended that can be used like a hardware server.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>instance ID</glossterm>
+ <glossdef>
+ <para>Alternative term for instance UUID.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>instance state</glossterm>
+ <glossdef>
+ <para>The current state of a guest VM image.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>instance type</glossterm>
+ <glossdef>
+ <para>Describes the parameters of the various virtual
+ machine images that are available to users,
+ includes parameters such as CPU, storage, and
+ memory. Alternative term for flavor.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>instance type ID</glossterm>
+ <glossdef>
+ <para>Alternative term for a flavor ID.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>instance UUID</glossterm>
+ <glossdef>
+ <para>Unique ID assigned to each guest VM
+ instance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>interface ID</glossterm>
+ <glossdef>
+ <para>Unique ID for a Networking VIF or vNIC in the form
+ of a UUID.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Internet Service Provider (ISP)</glossterm>
+ <glossdef>
+ <para>Any business that provides Internet access to
+ individuals or businesses.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ironic</glossterm>
+ <glossdef>
+ <para>OpenStack project that provisions bare metal, as
+ opposed to virtual, machines.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>IP address</glossterm>
+ <glossdef>
+ <para>Number that is unique to every computer system
+ on the Internet. Two versions of the Internet
+ Protocol (IP) are in use for addresses: IPv4 and
+ IPv6.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>IP Address Management (IPAM)</glossterm>
+ <glossdef>
+ <para>The process of automating IP address allocation,
+ deallocation, and management. Currently provided
+ by Compute, melange, and Networking.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>IPL</glossterm>
+ <glossdef>
+ <para>Initial Program Loader.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>IPMI</glossterm>
+ <glossdef>
+ <para>Intelligent Platform Management Interface. IPMI
+ is a standardized computer system interface used
+ by system administrators for out-of-band
+ management of computer systems and monitoring of
+ their operation. In layman's terms, it is a way to
+ manage a computer using a direct network
+ connection, whether it is turned on or not;
+ connecting to the hardware rather than an
+ operating system or login shell.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ip6tables</glossterm>
+ <glossdef>
+ <para>Tool used to set up, maintain, and inspect the tables of
+ IPv6 packet filter rules in the Linux kernel. In OpenStack
+ Compute, ip6tables is used along with arptables, ebtables,
+ and iptables to create firewalls for both nodes and
+ VMs.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>iptables</glossterm>
+ <glossdef>
+ <para>Used along with arptables and ebtables, iptables
+ create firewalls in Compute. iptables are the tables
+ provided by the Linux kernel firewall (implemented
+ as different Netfilter modules) and the chains and
+ rules it stores. Different kernel modules and
+ programs are currently used for different
+ protocols; iptables applies to IPv4, ip6tables to
+ IPv6, arptables to ARP, and ebtables to Ethernet
+ frames. Requires root privilege to
+ manipulate.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>iSCSI</glossterm>
+ <glossdef>
+ <para>The SCSI disk protocol tunneled within Ethernet,
+ supported by Compute, Object Storage, and Image Service.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ISO9960</glossterm>
+ <glossdef>
+ <para>One of the VM image disk formats supported by
+ Image Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>itsec</glossterm>
+ <glossdef>
+ <para>A default role in the Compute RBAC system that
+ can quarantine an instance in any
+ project.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .J. -->
+ <glossdiv>
+ <title>J</title>
+ <glossentry>
+ <glossterm>Java</glossterm>
+ <glossdef>
+ <para>A programming language that is used to create
+ systems that involve more than one computer by way
+ of a network.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>JavaScript</glossterm>
+ <glossdef>
+ <para>A scripting language that is used to build web
+ pages.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>JavaScript Object Notation (JSON)</glossterm>
+ <glossdef>
+ <para>One of the supported response formats in
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Jenkins</glossterm>
+ <glossdef>
+ <para>Tool used to run jobs automatically for
+ OpenStack development.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Juno</glossterm>
+ <glossdef>
+ <para>Project name for the tenth release of OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .K. -->
+ <glossdiv>
+ <title>K</title>
+ <glossentry>
+ <glossterm>kernel-based VM (KVM)</glossterm>
+ <glossdef>
+ <para>An OpenStack-supported hypervisor.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>keystone</glossterm>
+ <glossdef>
+ <para>The project that provides OpenStack Identity
+ services.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Kickstart</glossterm>
+ <glossdef>
+ <para>A tool to automate system configuration and
+ installation on Red Hat, Fedora, and CentOS based
+ Linux distributions.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .L. -->
+ <glossdiv>
+ <title>L</title>
+ <glossentry>
+ <glossterm>large object</glossterm>
+ <glossdef>
+ <para>An object within Object Storage that is larger than 5
+ GBs.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Launchpad</glossterm>
+ <glossdef>
+ <para>The collaboration site for OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Layer-2 network</glossterm>
+ <glossdef>
+ <para>Term used for OSI network architecture for the
+ data link layer.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>libvirt</glossterm>
+ <glossdef>
+ <para>Virtualization API library used by OpenStack to
+ interact with many of its supported
+ hypervisors.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Linux bridge</glossterm>
+ <glossdef>
+ <para>Software that enables multiple VMs to share a
+ single physical NIC within Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Linux Bridge neutron plug-in</glossterm>
+ <glossdef>
+ <para>Enables a Linux bridge to understand
+ a Networking port, interface attachment, and other
+ abstractions.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Linux containers (LXC)</glossterm>
+ <glossdef>
+ <para>An OpenStack-supported hypervisor.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>live migration</glossterm>
+ <glossdef>
+ <para>The ability within Compute to move running virtual
+ machine instances from one host to another with
+ only a small service interruption during
+ switch-over.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>load balancer</glossterm>
+ <glossdef>
+ <para>A load balancer is a logical device which
+ belongs to a cloud account. It is used to
+ distribute workloads between multiple back-end
+ systems or services, based on the criteria defined
+ as part of its configuration.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>load balancing</glossterm>
+ <glossdef>
+ <para>The process of spreading client requests between
+ two or more nodes to improve performance and
+ availability.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .M. -->
+ <glossdiv>
+ <title>M</title>
+ <glossentry>
+ <glossterm>management API</glossterm>
+ <glossdef>
+ <para>Alternative term for an admin API.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>management network</glossterm>
+ <glossdef>
+ <para>A network segment used for administration, not
+ accessible to the public internet.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>manager</glossterm>
+ <glossdef>
+ <para>Logical groupings of related code such as the
+ Block Storage volume manager or network manager.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>manifest</glossterm>
+ <glossdef>
+ <para>Used to track segments of a large object within
+ Object Storage.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>manifest object</glossterm>
+ <glossdef>
+ <para>A special Object Storage object that contains the
+ manifest for a large object.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>marconi</glossterm>
+ <glossdef>
+ <para>OpenStack project that provides a queue service
+ to applications.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>melange</glossterm>
+ <glossdef>
+ <para>Project name for OpenStack Network Information
+ Service. To be merged with Networking.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>membership</glossterm>
+ <glossdef>
+ <para>The association between an Image Service VM image and a
+ tenant. Enables images to be shared with specified
+ tenants.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>membership list</glossterm>
+ <glossdef>
+ <para>A list of tenants that can access a given VM
+ image within Image Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>memcached</glossterm>
+ <glossdef>
+ <para>A distributed memory object caching system that
+ is used by Object Storage for caching.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>memory overcommit</glossterm>
+ <glossdef>
+ <para>The ability to start new VM instances based on
+ the actual memory usage of a host, as opposed to
+ basing the decision on the amount of RAM each
+ running instance thinks it has available. Also
+ known as RAM overcommit.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>message broker</glossterm>
+ <glossdef>
+ <para>The software package used to provide AMQP
+ messaging capabilities within Compute. Default
+ package is RabbitMQ.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>message bus</glossterm>
+ <glossdef>
+ <para>The main virtual communication line used by all
+ AMQP messages for inter-cloud communications
+ within Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>message queue</glossterm>
+ <glossdef>
+ <para>Passes requests from clients to the appropriate
+ workers and returns the output to the client after
+ the job completes.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Meta-Data Server (MDS)</glossterm>
+ <glossdef>
+ <para>Stores CephFS metadata.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>migration</glossterm>
+ <glossdef>
+ <para>The process of moving a VM instance from one
+ host to another.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>multinic</glossterm>
+ <glossdef>
+ <para>Facility in Compute that allows each virtual
+ machine instance to have more than one VIF
+ connected to it.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Modular Layer 2 (ML2) neutron plug-in</glossterm>
+ <glossdef>
+ <para>Can concurrently use multiple
+ layer 2 networking technologies, such as 802.1Q and
+ VXLAN, in Networking.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Monitor (Mon)</glossterm>
+ <glossdef>
+ <para>A Ceph component that communicates with external
+ clients, checks data state and consistency, and
+ performs quorum functions.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>multi-factor authentication</glossterm>
+ <glossdef>
+ <para>Authentication method that uses two or more
+ credentials, such as a password and a private key.
+ Currently not supported in Identity Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>MultiNic</glossterm>
+ <glossdef>
+ <para>Facility in Compute that enables a virtual
+ machine instance to have more than one VIF
+ connected to it.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .N. -->
+ <glossdiv>
+ <title>N</title>
+ <glossentry>
+ <glossterm>Nebula</glossterm>
+ <glossdef>
+ <para>Released as open source by NASA in 2010 and is
+ the basis for Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>netadmin</glossterm>
+ <glossdef>
+ <para>One of the default roles in the Compute RBAC
+ system. Enables the user to allocate publicly
+ accessible IP addresses to instances and change
+ firewall rules.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>NetApp volume driver</glossterm>
+ <glossdef>
+ <para>Enables Compute to communicate with NetApp storage
+ devices through the NetApp OnCommand Provisioning
+ Manager.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>network</glossterm>
+ <glossdef>
+ <para>A virtual network that provides connectivity
+ between entities. For example, a collection of
+ virtual ports that share network connectivity. In
+ Networking terminology, a network is always a Layer-2
+ network.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Network Address Translation (NAT)</glossterm>
+ <glossdef>
+ <para>The process of modifying IP address information
+ while in-transit. Supported by Compute and
+ Networking.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>network controller</glossterm>
+ <glossdef>
+ <para>A Compute daemon that orchestrates the network
+ configuration of nodes including includes IP
+ addresses, VLANs, bridging, and manages routing
+ for both public and private networks.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Network File System (NFS)</glossterm>
+ <glossdef>
+ <para>A method for making file systems available over
+ the network. Supported by OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>network ID</glossterm>
+ <glossdef>
+ <para>Unique ID assigned to each network segment
+ within Networking. Same as network UUID</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>network manager</glossterm>
+ <glossdef>
+ <para>The Compute component that manages various network
+ components, such as firewall rules, IP address
+ allocation, and so on.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>network node</glossterm>
+ <glossdef>
+ <para>Any Compute node that runs the network worker
+ daemon.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>network segment</glossterm>
+ <glossdef>
+ <para>Represents a virtual, isolated OSI layer 2
+ subnet in Networking.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Network Time Protocol (NTP)</glossterm>
+ <glossdef>
+ <para>A method of keeping a clock for a host or node
+ correct through communications with a trusted,
+ accurate time source.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>network UUID</glossterm>
+ <glossdef>
+ <para>Unique ID for a Networking network segment.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>network worker</glossterm>
+ <glossdef>
+ <para>The nova-network worker daemon, provides
+ services such as giving an IP address to a booting
+ nova instance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Networking</glossterm>
+ <glossdef>
+ <para>A core OpenStack project that provides a network
+ connectivity abstraction layer to OpenStack
+ Compute. The project name of Networking is
+ neutron.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Networking API</glossterm>
+ <glossdef>
+ <para>API used to access OpenStack Networking. Provides an
+ extensible architecture to enable custom plug-in
+ creation.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>neutron</glossterm>
+ <glossdef>
+ <para>A core OpenStack project that provides a network
+ connectivity abstraction layer to OpenStack
+ Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>neutron API</glossterm>
+ <glossdef>
+ <para>An alternative name for Networking API.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>neutron manager</glossterm>
+ <glossdef>
+ <para>Enables Compute and Networking integration, which
+ enables Networking to perform network management for
+ guest VMs.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>neutron plug-in</glossterm>
+ <glossdef>
+ <para>Interface within Networking that enables
+ organizations to create custom plug-ins for
+ advanced features such as QoS, ACLs, or
+ IDS.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Nexenta volume driver</glossterm>
+ <glossdef>
+ <para>Provides support for NexentaStor devices in
+ Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>No ACK</glossterm>
+ <glossdef>
+ <para>Disables server-side message acknowledgment in
+ the Compute RabbitMQ. Increases performance but
+ decreases reliability.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>node</glossterm>
+ <glossdef>
+ <para>A VM instance that runs on a host.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>non-durable exchange</glossterm>
+ <glossdef>
+ <para>Message exchange that is cleared when the
+ service restarts. Its data is not written to
+ persistent storage.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>non-durable queue</glossterm>
+ <glossdef>
+ <para>Message queue that is cleared when the service
+ restarts. Its data is not written to persistent
+ storage.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>non-persistent volume</glossterm>
+ <glossdef>
+ <para>Alternative term for an ephemeral volume.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>nova</glossterm>
+ <glossdef>
+ <para>OpenStack project that provides compute
+ services.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Nova API</glossterm>
+ <glossdef>
+ <para>Alternative term for the Compute
+ API.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>nova-network</glossterm>
+ <glossdef>
+ <para>A Compute component that manages IP address
+ allocation, firewalls, and other network-related
+ tasks. This is the legacy networking option and an
+ alternative to Networking.
+ </para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .O. -->
+ <glossdiv>
+ <title>O</title>
+ <glossentry>
+ <glossterm>object</glossterm>
+ <glossdef>
+ <para>A BLOB of data held by Object Storage, can be in any
+ format.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>object auditor</glossterm>
+ <glossdef>
+ <para>Opens all objects for an object server and
+ verifies the MD5 hash, size, and metadata for each
+ object.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>object expiration</glossterm>
+ <glossdef>
+ <para>A configurable option within Object Storage to
+ automatically delete objects after a specified
+ amount of time has passed or a certain date is
+ reached.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>object hash</glossterm>
+ <glossdef>
+ <para>Uniquely ID for an Object Storage object.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>object path hash</glossterm>
+ <glossdef>
+ <para>Used by Object Storage to determine the location of an
+ object in the ring. Maps objects to
+ partitions.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>object replicator</glossterm>
+ <glossdef>
+ <para>An Object Storage component that copies and object to
+ remote partitions for fault tolerance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>object server</glossterm>
+ <glossdef>
+ <para>An Object Storage component that is responsible for
+ managing objects.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Object Storage</glossterm>
+ <glossdef>
+ <para>The OpenStack core project that
+ provides eventually consistent and redundant
+ storage and retrieval of fixed digital
+ content. The project name of OpenStack
+ Object Storage is swift.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Object Storage API</glossterm>
+ <glossdef>
+ <para>API used to access OpenStack Object Storage.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Object Storage Device (OSD)</glossterm>
+ <glossdef>
+ <para>The Ceph storage daemon.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>object versioning</glossterm>
+ <glossdef>
+ <para>Allows a user to set a flag on an Object Storage container
+ so all objects within the container are
+ versioned.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Oldie</glossterm>
+ <glossdef>
+ <para>Term for an Object Storage process that runs
+ for a long time. Can indicate a hung
+ process.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Open Cloud Computing Interface
+ (OCCI)</glossterm>
+ <glossdef>
+ <para>A standardized interface for managing compute,
+ data, and network resources, currently unsupported
+ in OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Open Virtualization Format (OVF)</glossterm>
+ <glossdef>
+ <para>Standard for packaging VM images. Supported in
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Open vSwitch neutron plug-in</glossterm>
+ <glossdef>
+ <para>Provides support for
+ Open vSwitch in Networking.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>OpenLDAP</glossterm>
+ <glossdef>
+ <para>An open source LDAP server. Supported by both
+ Compute and Identity Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>OpenStack</glossterm>
+ <glossdef>
+ <para>
+ OpenStack is a cloud operating system that controls
+ large pools of compute, storage, and networking
+ resources throughout a datacenter, all managed through
+ a dashboard that gives administrators control while
+ empowering their users to provision resources through
+ a web interface. OpenStack is an Open Source project licensed
+ under the Apache License 2.0.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>openSUSE</glossterm>
+ <glossdef>
+ <para>A Linux distribution that is compatible with
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>operator</glossterm>
+ <glossdef>
+ <para>The person responsible for planning and
+ maintaining an OpenStack installation.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Orchestration</glossterm>
+ <glossdef>
+ <para>An integrated project that
+ orchestrates multiple cloud applications for
+ OpenStack. The project name of Orchestration is
+ heat.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>orphan</glossterm>
+ <glossdef>
+ <para>In the context of Object Storage this is a process that
+ is not terminated after an upgrade, restart, or
+ reload of the service.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .P. -->
+ <glossdiv>
+ <title>P</title>
+ <glossentry>
+ <glossterm>parent cell</glossterm>
+ <glossdef>
+ <para>If a requested resource, such as CPU time, disk
+ storage, or memory, is not available in the parent
+ cell, the request is forwarded to associated child
+ cells.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>partition</glossterm>
+ <glossdef>
+ <para>A unit of storage within Object Storage used to store
+ objects, exists on top of devices, replicated for
+ fault tolerance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>partition index</glossterm>
+ <glossdef>
+ <para>Contains the locations of all Object Storage partitions
+ within the ring.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>partition shift value</glossterm>
+ <glossdef>
+ <para>Used by Object Storage to determine which partition data
+ should reside on.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>pause</glossterm>
+ <glossdef>
+ <para>A VM state where no changes occur (no changes in
+ memory, network communications stop, etc), the VM
+ is frozen but not shut down.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>PCI passthrough</glossterm>
+ <glossdef>
+ <para>Gives guest VMs exclusive access to a
+ PCI device. Currently supported in OpenStack Havana
+ and later releases.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>persistent message</glossterm>
+ <glossdef>
+ <para>A message that is stored both in memory and on
+ disk, the message is not lost after a failure or
+ restart.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>persistent volume</glossterm>
+ <glossdef>
+ <para>Changes to these types of disk volumes are
+ saved.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>personality file</glossterm>
+ <glossdef>
+ <para>A file used to customize a Compute instance, can be
+ used to inject SSH keys or a specific network
+ configuration.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>plug-in</glossterm>
+ <glossdef>
+ <para>Software component providing the actual
+ implementation for Networking APIs, or for Compute
+ APIs, depending on the context.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>policy service</glossterm>
+ <glossdef>
+ <para>Component of Identity Service that provides a rule
+ management interface and a rule based
+ authorization engine.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>port</glossterm>
+ <glossdef>
+ <para>A virtual network port within Networking, VIFs /
+ vNICs are connected to a port.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>port UUID</glossterm>
+ <glossdef>
+ <para>Unique ID for a Networking port.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>preseed</glossterm>
+ <glossdef>
+ <para>A tool to automate system configuration and
+ installation on Debian-based Linux
+ distributions.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>private image</glossterm>
+ <glossdef>
+ <para>An Image Service VM image that is only available to
+ specified tenants.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>private IP address</glossterm>
+ <glossdef>
+ <para>An IP address used for management and
+ administration, not available to the public
+ internet.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>private network</glossterm>
+ <glossdef>
+ <para>The Network Controller provides virtual networks
+ to enable compute servers to interact with each
+ other and with the public network. All machines
+ must have a public and private network interface.
+ A private network interface can be a flat or VLAN
+ network interface. A flat network interface is
+ controlled by the flat_interface with flat
+ managers. A VLAN network interface is controlled
+ by the vlan_interface option with VLAN managers.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>project</glossterm>
+ <glossdef>
+ <para>A logical grouping of users within Compute, used to
+ define quotas and access to VM images.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>project ID</glossterm>
+ <glossdef>
+ <para>User defined alpha-numeric string in Compute, the
+ name of a project.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>project VPN</glossterm>
+ <glossdef>
+ <para>Alternative term for a cloudpipe.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>provider</glossterm>
+ <glossdef>
+ <para>An administrator who has access to all hosts and
+ instances.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>proxy node</glossterm>
+ <glossdef>
+ <para>A node that provides the Object Storage proxy
+ service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>proxy server</glossterm>
+ <glossdef>
+ <para>Users of Object Storage interact with the service through
+ the proxy server which in-turn looks up the
+ location of the requested data within the ring and
+ returns the results to the user.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>public API</glossterm>
+ <glossdef>
+ <para>An API endpoint used for both service to service
+ communication and end user interactions.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>public image</glossterm>
+ <glossdef>
+ <para>An Image Service VM image that is available to all
+ tenants.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>public IP address</glossterm>
+ <glossdef>
+ <para>An IP address that is accessible to
+ end-users.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>public network</glossterm>
+ <glossdef>
+ <para>The Network Controller provides virtual networks
+ to enable compute servers to interact with each
+ other and with the public network. All machines
+ must have a public and private network interface.
+ The public network interface is controlled by the
+ public_interface option.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Puppet</glossterm>
+ <glossdef>
+ <para>An operating system configuration management
+ tool supported by OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Python</glossterm>
+ <glossdef>
+ <para>Programming language used extensively in
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .Q. -->
+ <glossdiv>
+ <title>Q</title>
+ <glossentry>
+ <glossterm>QEMU Copy On Write 2 (QCOW2)</glossterm>
+ <glossdef>
+ <para>One of the VM image disk formats supported by
+ Image Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Qpid</glossterm>
+ <glossdef>
+ <para>Message queue software supported by OpenStack,
+ an alternative to RabbitMQ.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>quarantine</glossterm>
+ <glossdef>
+ <para>If Object Storage finds objects, containers, or accounts
+ that are corrupt they are placed in this state,
+ are not replicated, cannot be read by clients, and
+ a correct copy is re-replicated.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Quick EMUlator (QEMU)</glossterm>
+ <glossdef>
+ <para>QEMU is a generic and open source machine
+ emulator and virtualizer.</para>
+ <para>One of the hypervisors supported by OpenStack,
+ generally used for development purposes.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>quota</glossterm>
+ <glossdef>
+ <para>In Compute and Block Storage, the ability to set
+ resource limits on a per-project basis.
+ </para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .R. -->
+ <glossdiv>
+ <title>R</title>
+ <glossentry>
+ <glossterm>RabbitMQ</glossterm>
+ <glossdef>
+ <para>The default message queue software used by
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Rackspace Cloud Files</glossterm>
+ <glossdef>
+ <para>Released as open source by Rackspace in 2010,
+ the basis for Object Storage.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>RADOS Block Device (RBD)</glossterm>
+ <glossdef>
+ <para>Ceph component that enables a Linux block
+ device to be striped over multiple distributed
+ data stores.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>radvd</glossterm>
+ <glossdef>
+ <para>The router advertisement daemon, used by the
+ Compute VLAN manager and FlatDHCP manager to provide
+ routing services for VM instances.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>RAM filter</glossterm>
+ <glossdef>
+ <para>The Compute setting that enables or disables RAM
+ overcommitment.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>RAM overcommit</glossterm>
+ <glossdef>
+ <para>The ability to start new VM instances based on
+ the actual memory usage of a host, as opposed to
+ basing the decision on the amount of RAM each
+ running instance thinks it has available. Also
+ known as memory overcommit.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>rate limit</glossterm>
+ <glossdef>
+ <para>Configurable option within Object Storage to limit
+ database writes on a per-account and/or
+ per-container basis.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>raw</glossterm>
+ <glossdef>
+ <para>One of the VM image disk formats supported by
+ Image Service, an unstructured disk image.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>rebalance</glossterm>
+ <glossdef>
+ <para>The process of distributing Object Storage partitions
+ across all drives in the ring, used during initial
+ ring creation and after ring
+ reconfiguration.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>reboot</glossterm>
+ <glossdef>
+ <para>Either a soft or hard reboot of a server. With a
+ soft reboot, the operating system is signaled to
+ restart, which enables a graceful shutdown of
+ all processes. A hard reboot is the equivalent of
+ power cycling the server. The virtualization
+ platform should ensure that the reboot action has
+ completed successfully even in cases in which the
+ underlying domain/vm is paused or halted/stopped.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>rebuild</glossterm>
+ <glossdef>
+ <para>Removes all data on the server and replaces it
+ with the specified image. Server ID and IP
+ addresses remain the same.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Recon</glossterm>
+ <glossdef>
+ <para>An Object Storage component that collects metrics.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>record</glossterm>
+ <glossdef>
+ <para>Belongs to a particular domain and is used to
+ specify information about the domain. There are
+ several types of DNS records. Each record type
+ contains particular information used to describe
+ the purpose of that record. Examples include mail
+ exchange (MX) records, which specify the mail
+ server for a particular domain, and name server
+ (NS) records, which specify the authoritative name
+ servers for a domain.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>record ID</glossterm>
+ <glossdef>
+ <para>A number within a database that is incremented
+ each time a change is made. Used by Object Storage when
+ replicating.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Red Dwarf Lite</glossterm>
+ <glossdef>
+ <para>Community project that aims to provide database
+ as a service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Red Hat Enterprise Linux (RHEL)</glossterm>
+ <glossdef>
+ <para>A Linux distribution that is compatible with
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>reference architecture</glossterm>
+ <glossdef>
+ <para>A recommended architecture for an OpenStack
+ cloud.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>region</glossterm>
+ <glossdef>
+ <para>A Discrete OpenStack environment with dedicated API
+ endpoints that typically shares only the Identity
+ Service (keystone) with other regions.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>registry</glossterm>
+ <glossdef>
+ <para>Alternative term for the Image Service
+ registry.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>registry server</glossterm>
+ <glossdef>
+ <para>An Image Service that provides VM image metadata
+ information to clients.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Reliable, Autonomic Distributed Object Store
+ (RADOS)</glossterm>
+ <glossdef>
+ <para>A collection of components that provides object
+ storage within Ceph. Similar to OpenStack Object
+ Storage.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Remote Procedure Call (RPC)</glossterm>
+ <glossdef>
+ <para>The method used by the Compute RabbitMQ for
+ intra-service communications.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>replica</glossterm>
+ <glossdef>
+ <para>Provides data redundancy and fault tolerance by
+ creating copies of Object Storage objects, accounts, and
+ containers so they are not lost when the
+ underlying storage fails.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>replica count</glossterm>
+ <glossdef>
+ <para>The number of replicas of the data in an Object Storage
+ ring.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>replication</glossterm>
+ <glossdef>
+ <para>The process of copying data to a separate
+ physical device for fault tolerance and
+ performance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>replicator</glossterm>
+ <glossdef>
+ <para>The Object Storage back-end process that creates and
+ manages object replicas.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>request ID</glossterm>
+ <glossdef>
+ <para>Unique ID assigned to each request sent to
+ Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>rescue image</glossterm>
+ <glossdef>
+ <para>A special type of VM image that is booted when
+ an instance is placed into rescue mode. Allows an
+ administrator to mount the file systems for an
+ instance to correct the problem.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>resize</glossterm>
+ <glossdef>
+ <para>Converts an existing server to a different
+ flavor, which scales the server up or down.
+ The original server is saved to enable rollback if
+ a problem occurs. All resizes must be tested
+ and explicitly confirmed, at which time the
+ original server is removed.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>RESTful</glossterm>
+ <glossdef>
+ <para>A kind of web service API that uses REST, or
+ Representational State Transfer. REST is the style
+ of architecture for hypermedia systems that is
+ used for the World Wide Web.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ring</glossterm>
+ <glossdef>
+ <para>An entity that maps Object Storage data to partitions. A
+ separate ring exists for each service, such as
+ account, object, and container.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>ring builder</glossterm>
+ <glossdef>
+ <para>Builds and manages rings within Object Storage, assigns
+ partitions to devices, and pushes the
+ configuration to other storage nodes.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Role Based Access Control (RBAC)</glossterm>
+ <glossdef>
+ <para>Provides a predefined list of actions that the
+ user can perform such as start or stop VMs, reset
+ passwords, and so on. Supported in both Identity Service
+ and Compute and can be configured using the horizon
+ dashboard.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>role</glossterm>
+ <glossdef>
+ <para>A personality that a user assumes that enables
+ them to perform a specific set of operations. A
+ role includes a set of rights and privileges. A
+ user assuming that role inherits those rights and
+ privileges.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>role ID</glossterm>
+ <glossdef>
+ <para>Alpha-numeric ID assigned to each Identity Service
+ role.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>rootwrap</glossterm>
+ <glossdef>
+ <para>A feature of Compute that allows the unprivileged
+ "nova" user to run a specified list of commands as
+ the Linux root user.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>round-robin scheduler</glossterm>
+ <glossdef>
+ <para>Type of Compute scheduler that evenly distributes
+ instances among available hosts.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>routing key</glossterm>
+ <glossdef>
+ <para>The Compute direct exchanges, fanout exchanges, and
+ topic exchanges use this to determine how to
+ process a message, processing varies depending on
+ exchange type.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>RPC driver</glossterm>
+ <glossdef>
+ <para>Modular system that allows the underlying
+ message queue software of Compute to be changed. For
+ example, from RabbitMQ to ZeroMQ or Qpid.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>rsync</glossterm>
+ <glossdef>
+ <para>Used by Object Storage to push object replicas.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>RXTX cap</glossterm>
+ <glossdef>
+ <para>Absolute limit on the amount of network traffic
+ a Compute VM instance can send and receive.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>RXTX quota</glossterm>
+ <glossdef>
+ <para>Soft limit on the amount of network traffic a
+ Compute VM instance can send and receive.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Ryu neutron plug-in</glossterm>
+ <glossdef>
+ <para>Enables the Ryu network operating system to
+ function as a Networking OpenFlow controller.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .S. -->
+ <glossdiv>
+ <title>S</title>
+ <glossentry>
+ <glossterm>S3</glossterm>
+ <glossdef>
+ <para>Object storage service by Amazon, similar in
+ function to Object Storage, can act as a back-end store for
+ Image Service VM images.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>savanna</glossterm>
+ <glossdef>
+ <para>OpenStack project that provisions Hadoop on top
+ of OpenStack to provide a data processing
+ service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>scheduler manager</glossterm>
+ <glossdef>
+ <para>A Compute component that determines where VM
+ instances should start. Uses modular design to
+ support a variety of scheduler types.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>scoped token</glossterm>
+ <glossdef>
+ <para>An Identity Service API access token that is associated
+ with a specific tenant.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>scrubber</glossterm>
+ <glossdef>
+ <para>Checks for and deletes unused VM, the component
+ of Image Service that implements delayed delete.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>secret key</glossterm>
+ <glossdef>
+ <para>String of text only known by the user, used
+ along with an access key to make requests to the
+ Compute API.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>secure shell (SSH)</glossterm>
+ <glossdef>
+ <para>Open source tool used to access remote hosts
+ through an encrypted communications channel, SSH
+ key injection is supported by Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>security group</glossterm>
+ <glossdef>
+ <para>A set of network traffic filtering rules that
+ are applied to a Compute instance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>segmented object</glossterm>
+ <glossdef>
+ <para>An Object Storage large object that has been broken up
+ into pieces, the re-assembled object is called a
+ concatenated object.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>server</glossterm>
+ <glossdef>
+ <para>Computer that provides explicit services to the
+ client software running on that system, often
+ managing a variety of computer operations.</para>
+ <para>A server is a VM instance in the compute system.
+ Flavor and image are requisite elements when
+ creating a server.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>server image</glossterm>
+ <glossdef>
+ <para>Alternative term for a VM image.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>server UUID</glossterm>
+ <glossdef>
+ <para>Unique ID assigned to each guest VM
+ instance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>service</glossterm>
+ <glossdef>
+ <para>
+ An OpenStack service, such as Compute, Object
+ Storage, or Image Service. Provides one or more
+ endpoints through which users can access resources
+ and perform operations.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>service catalog</glossterm>
+ <glossdef>
+ <para>Alternative term for the Identity Service
+ catalog.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>service ID</glossterm>
+ <glossdef>
+ <para>Unique ID assigned to each service that is
+ available in the Identity Service catalog.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>service registration</glossterm>
+ <glossdef>
+ <para>An Identity Service feature that enables services,
+ such as Compute,
+ to automatically register with the
+ catalog.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>service tenant</glossterm>
+ <glossdef>
+ <para>Special tenant that contains all
+ services that are listed in the catalog.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>service token</glossterm>
+ <glossdef>
+ <para>An administrator defined token used by Compute to
+ communicate securely with the Identity Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>session back-end</glossterm>
+ <glossdef>
+ <para>The method of storage used by horizon to track
+ client sessions such as local memory, cookies, a
+ database, or memcached.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>session persistence</glossterm>
+ <glossdef>
+ <para>A feature of the load balancing service. It
+ attempts to force subsequent connections to a
+ service to be redirected to the same node as long
+ as it is online.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>session storage</glossterm>
+ <glossdef>
+ <para>A horizon component that stores and tracks
+ client session information. Implemented through
+ the Django sessions framework.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>shared IP address</glossterm>
+ <glossdef>
+ <para>An IP address that can be assigned to a VM
+ instance within the shared IP group. Public IP
+ addresses can be shared across multiple servers
+ for use in various high availability scenarios.
+ When an IP address is shared to another server,
+ the cloud network restrictions are modified to
+ enable each server to listen to and respond on that
+ IP address. You can optionally specify that the
+ target server network configuration be modified.
+ Shared IP addresses can be used with many standard
+ heartbeat facilities, such as keepalive, that
+ monitor for failure and manage IP failover.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>shared IP group</glossterm>
+ <glossdef>
+ <para>A collection of servers that can share IPs with
+ other members of the group. Any server in a group
+ can share one or more public IPs with any other
+ server in the group. With the exception of the
+ first server in a shared IP group, servers must be
+ launched into shared IP groups. A server may only
+ be a member of one shared IP group.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>shared storage</glossterm>
+ <glossdef>
+ <para>Block storage that is simultaneously accessible
+ by multiple clients. For example, NFS.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Sheepdog</glossterm>
+ <glossdef>
+ <para>Distributed block storage system for QEMU,
+ supported by OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Simple Cloud Identity Management
+ (SCIM)</glossterm>
+ <glossdef>
+ <para>Specification for managing identity in the
+ cloud, currently unsupported by OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Single-root I/O Virtualization
+ (SR-IOV)</glossterm>
+ <glossdef>
+ <para>A specification that when implemented by a physical PCIe
+ device enables it to appear as multiple separate
+ PCIe devices. This enables multiple virtualized guests
+ to share direct access to the physical device, offering
+ improved performance over an equivalent virtual device.
+ Currently supported in OpenStack Havana and later
+ releases.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>SmokeStack</glossterm>
+ <glossdef>
+ <para>Runs automated tests against the core OpenStack
+ API, written in Rails.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>snapshot</glossterm>
+ <glossdef>
+ <para>A point-in-time copy of an OpenStack storage
+ volume or image. Use storage volume snapshots to
+ back up volumes. Use image snapshots to back up
+ data, or as "gold" images for additional servers.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>soft reboot</glossterm>
+ <glossdef>
+ <para>A controlled reboot where a VM instance is
+ properly restarted through operating system
+ commands.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>SolidFire Volume Driver</glossterm>
+ <glossdef>
+ <para>The Block Storage driver for the SolidFire iSCSI
+ storage appliance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>SPICE</glossterm>
+ <glossdef>
+ <para>
+ The Simple Protocol for Independent Computing
+ Environments (SPICE) provides remote desktop access
+ to guest virtual machines. It is an alternative to
+ VNC. SPICE is supported by OpenStack.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>spread-first scheduler</glossterm>
+ <glossdef>
+ <para>The Compute VM scheduling algorithm that attempts
+ to start new VM on the host with the least amount
+ of load.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>SQL-Alchemy</glossterm>
+ <glossdef>
+ <para>An open source SQL toolkit for Python, used in
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>SQLite</glossterm>
+ <glossdef>
+ <para>A lightweight SQL database, used as the default
+ persistent storage method in many OpenStack
+ services.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>StackTach</glossterm>
+ <glossdef>
+ <para>Community project that captures Compute AMQP
+ communications, useful for debugging.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>static IP address</glossterm>
+ <glossdef>
+ <para>Alternative term for a fixed IP address.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>StaticWeb</glossterm>
+ <glossdef>
+ <para>WSGI middleware component of Object Storage that serves
+ container data as a static web page.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>storage back-end</glossterm>
+ <glossdef>
+ <para>The method that a service uses for persistent
+ storage such as iSCSI, NFS, or local disk.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>storage node</glossterm>
+ <glossdef>
+ <para>An Object Storage node that provides container services,
+ account services, and object services, controls
+ the account databases, container databases, and
+ object storage.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>storage manager</glossterm>
+ <glossdef>
+ <para>A XenAPI component that provides a pluggable
+ interface to support a wide variety of persistent
+ storage back-ends.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>storage manager back-end</glossterm>
+ <glossdef>
+ <para>A persistent storage method supported by XenAPI
+ such as iSCSI or NFS.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>storage services</glossterm>
+ <glossdef>
+ <para>Collective name for the Object Storage object services,
+ container services, and account services.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>strategy</glossterm>
+ <glossdef>
+ <para>Specifies the authentication source used by
+ Image Service or Identity Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>subdomain</glossterm>
+ <glossdef>
+ <para>A domain within a parent domain. Subdomains
+ cannot be registered. Subdomains enable you to
+ delegate domains. Subdomains can themselves have
+ subdomains, so third-level, fourth-level,
+ fifth-level, and deeper levels of nesting are
+ possible.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>SUSE Linux Enterprise Server (SLES)</glossterm>
+ <glossdef>
+ <para>A Linux distribution that is compatible with
+ OpenStack.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>suspend</glossterm>
+ <glossdef>
+ <para>Alternative term for a paused VM
+ instance.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>swap</glossterm>
+ <glossdef>
+ <para>Disk-based virtual memory, used by operating
+ systems to provide more memory than is actually
+ available on the system.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>swawth</glossterm>
+ <glossdef>
+ <para>An authentication and authorization service for
+ Object Storage, implemented through WSGI middleware, uses
+ Object Storage itself as the persistent backing
+ store.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>swift</glossterm>
+ <glossdef>
+ <para>An OpenStack core project that provides object
+ storage services.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>swift All in One (SAIO)</glossterm>
+ <glossdef>
+ <para>Creates a full Object Storage development environment
+ within a single VM.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>swift middleware</glossterm>
+ <glossdef>
+ <para>Collective term for Object Storage components that
+ provide additional functionality.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>swift proxy server</glossterm>
+ <glossdef>
+ <para>Acts as the gatekeeper to Object Storage and is
+ responsible for authenticating the user.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>swift storage node</glossterm>
+ <glossdef>
+ <para>A node that runs Object Storage account, container, and
+ object services.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>sync point</glossterm>
+ <glossdef>
+ <para>Point in time since the last container and
+ accounts database sync among nodes within
+ Object Storage.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>sysadmin</glossterm>
+ <glossdef>
+ <para>One of the default roles in the Compute RBAC
+ system. Enables a user to add other users to a project,
+ interact with VM images that are
+ associated with the project, and start and stop VM
+ (VM) instances.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>system usage</glossterm>
+ <glossdef>
+ <para>A Compute component that, along with the
+ notification system, collects metrics and usage
+ information. This information can be used for billing.
+ </para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .T. -->
+ <glossdiv>
+ <title>T</title>
+ <glossentry>
+ <glossterm>Telemetry</glossterm>
+ <glossdef>
+ <para>An integrated project that provides
+ metering and measuring facilities for OpenStack. The
+ project name of Telemetry is ceilometer.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>TempAuth</glossterm>
+ <glossdef>
+ <para>An authentication facility within Object Storage that
+ enables Object Storage itself to perform authentication and
+ authorization. Frequently used in testing and
+ development.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Tempest</glossterm>
+ <glossdef>
+ <para>Automated software test suite designed to run
+ against the trunk of the OpenStack core
+ project.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>TempURL</glossterm>
+ <glossdef>
+ <para>An Object Storage middleware component that enables creation of URLs for temporary object access.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>tenant</glossterm>
+ <glossdef>
+ <para>A group of users, used to isolate access to Compute
+ resources. An alternative term for a
+ project.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Tenant API</glossterm>
+ <glossdef>
+ <para>An API that is accessible to tenants.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>tenant endpoint</glossterm>
+ <glossdef>
+ <para>An Identity Service API endpoint that is associated with
+ one or more tenants.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>tenant ID</glossterm>
+ <glossdef>
+ <para>Unique ID assigned to each tenant within
+ the Identity Service, the project IDs map to the
+ tenant IDs.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>token</glossterm>
+ <glossdef>
+ <para>An alpha-numeric string of text used to access
+ OpenStack APIs and resources.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>token services</glossterm>
+ <glossdef>
+ <para>An Identity Service component that manages and validates
+ tokens after a user or tenant has been
+ authenticated.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>tombstone</glossterm>
+ <glossdef>
+ <para>Used to mark Object Storage objects that have been
+ deleted, ensures the object is not updated on
+ another node after it has been deleted.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>topic publisher</glossterm>
+ <glossdef>
+ <para>A process that is created when a RPC call is
+ executed, used to push the message to the topic
+ exchange.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Torpedo</glossterm>
+ <glossdef>
+ <para>Community project used to run automated tests
+ against the OpenStack API.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>transaction ID</glossterm>
+ <glossdef>
+ <para>Unique ID assigned to each Object Storage request, used
+ for debugging and tracing.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>transient</glossterm>
+ <glossdef>
+ <para>Alternative term for non-durable.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>transient exchange</glossterm>
+ <glossdef>
+ <para>Alternative term for a non-durable
+ exchange.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>transient message</glossterm>
+ <glossdef>
+ <para>A message that is stored in memory and is lost
+ after the server is restarted.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>transient queue</glossterm>
+ <glossdef>
+ <para>Alternative term for a non-durable queue.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>trove</glossterm>
+ <glossdef>
+ <para>OpenStack project that provides database
+ services to applications.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .U. -->
+ <glossdiv>
+ <title>U</title>
+ <glossentry>
+ <glossterm>Ubuntu</glossterm>
+ <glossdef>
+ <para>A Debian-based Linux distribution.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>unscoped token</glossterm>
+ <glossdef>
+ <para>Alternative term for an Identity Service default
+ token.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>updater</glossterm>
+ <glossdef>
+ <para>Collective term for a group of Object Storage components
+ that processes queued and failed updates for
+ containers and objects.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>user</glossterm>
+ <glossdef>
+ <para>In Identity Service each user is associated with one or
+ more tenants, and in Compute they can be associated
+ with roles, projects, or both.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>user data</glossterm>
+ <glossdef>
+ <para>A blob of data that can be specified by the user
+ when launching an instance. This data can be
+ accessed by the instance through the metadata
+ service or config drive. Commonly used for passing
+ a shell script that is executed by the instance on
+ boot.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>User Mode Linux (UML)</glossterm>
+ <glossdef>
+ <para>An OpenStack-supported hypervisor.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .V. -->
+ <glossdiv>
+ <title>V</title>
+ <glossentry>
+ <glossterm>VIF UUID</glossterm>
+ <glossdef>
+ <para>Unique ID assigned to each Networking VIF.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Virtual Central Processing Unit
+ (vCPU)</glossterm>
+ <glossdef>
+ <para>Sub-divides physical CPUs. Instances can then use those
+ divisions.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Virtual Disk Image (VDI)</glossterm>
+ <glossdef>
+ <para>One of the VM image disk formats supported by
+ Image Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Virtual Hard Disk (VHD)</glossterm>
+ <glossdef>
+ <para>One of the VM image disk formats supported by
+ Image Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>virtual IP</glossterm>
+ <glossdef>
+ <para>An Internet Protocol (IP) address configured on
+ the load balancer for use by clients connecting to
+ a service that is load balanced. Incoming
+ connections are distributed to back-end nodes
+ based on the configuration of the load balancer.
+ </para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>virtual machine (VM)</glossterm>
+ <glossdef>
+ <para>An operating system instance that runs on top of
+ a hypervisor. Multiple VMs can run at the same
+ time on the same physical host.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>virtual network</glossterm>
+ <glossdef>
+ <para>An L2 network segment within Networking.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Virtual Network Computing (VNC)</glossterm>
+ <glossdef>
+ <para>Open source GUI and CLI tools used for remote
+ console access to VMs. Supported by Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Virtual Network InterFace (VIF)</glossterm>
+ <glossdef>
+ <para>An interface that is plugged into a port in a
+ Networking network. Typically a virtual network
+ interface belonging to a VM.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>virtual port</glossterm>
+ <glossdef>
+ <para>Attachment point where a virtual interface
+ connects to a virtual network.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>virtual private network (VPN)</glossterm>
+ <glossdef>
+ <para>Provided by Compute in the form of cloudpipes,
+ specialized instances that are used to create VPNs
+ on a per-project basis.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>virtual server</glossterm>
+ <glossdef>
+ <para>Alternative term for a VM or guest.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>virtual switch (vSwitch)</glossterm>
+ <glossdef>
+ <para>Software that runs on a host or node and
+ provides the features and functions of a hardware
+ based network switch.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>virtual VLAN</glossterm>
+ <glossdef>
+ <para>Alternative term for a virtual network.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>VirtualBox</glossterm>
+ <glossdef>
+ <para>An OpenStack-supported hypervisor.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>VLAN manager</glossterm>
+ <glossdef>
+ <para>A Compute component that provides dnsmasq, radvd,
+ and sets up forwarding to and from cloudpipe
+ instances.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>VLAN network</glossterm>
+ <glossdef>
+ <para>The Network Controller provides virtual networks
+ to enable compute servers to interact with each
+ other and with the public network. All machines
+ must have a public and private network interface.
+ A VLAN network is a private network interface,
+ which is controlled by the vlan_interface option
+ with VLAN managers.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>VM disk (VMDK)</glossterm>
+ <glossdef>
+ <para>One of the VM image disk formats supported by
+ Image Service.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>VM image</glossterm>
+ <glossdef>
+ <para>Alternative term for an image.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>VM Remote Control (VMRC)</glossterm>
+ <glossdef>
+ <para>Method to access VM instance consoles using a
+ web browser. Supported by Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>VMware API</glossterm>
+ <glossdef>
+ <para>Supports interaction with VMware products in
+ Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>VMware NSX Neutron plugin</glossterm>
+ <glossdef>
+ <para>Provides support for VMware NSX in Neutron.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>VNC proxy</glossterm>
+ <glossdef>
+ <para>A Compute component that provides users access to
+ the consoles of their VM instances through VNC or
+ VMRC.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>volume</glossterm>
+ <glossdef>
+ <para>Disk-based data storage generally represented as
+ an iSCSI target with a file system that supports
+ extended attributes, can be persistent or
+ ephemeral.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Volume API</glossterm>
+ <glossdef>
+ <para>An API on a separate endpoint for attaching,
+ detaching, and creating block storage for compute
+ VMs.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>volume controller</glossterm>
+ <glossdef>
+ <para>A Block Storage component that oversees and coordinates
+ storage volume actions.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>volume driver</glossterm>
+ <glossdef>
+ <para>Alternative term for a volume plug-in.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>volume ID</glossterm>
+ <glossdef>
+ <para>Unique ID applied to each storage volume under
+ the Block Storage control.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>volume manager</glossterm>
+ <glossdef>
+ <para>A Block Storage component that creates, attaches, and
+ detaches persistent storage volumes.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>volume node</glossterm>
+ <glossdef>
+ <para>A Block Storage node that runs the
+ <systemitem class="service">cinder-volume</systemitem>
+ daemon.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>volume plug-in</glossterm>
+ <glossdef>
+ <para>Provides
+ support for new and specialized types of
+ back-end storage for the Block Storage
+ volume manager.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Volume Service API</glossterm>
+ <glossdef>
+ <para>Alternative term for the Compute volume API.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>volume worker</glossterm>
+ <glossdef>
+ <para>A cinder component that interacts with back-end
+ storage to manage the creation and deletion of
+ volumes and the creation of compute volumes,
+ provided by the <systemitem class="service">cinder-volume</systemitem> daemon.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>vSphere</glossterm>
+ <glossdef>
+ <para>An OpenStack-supported hypervisor.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .W. -->
+ <glossdiv>
+ <title>W</title>
+ <glossentry>
+ <glossterm>weighing</glossterm>
+ <glossdef>
+ <para>A Compute process that determines the suitability
+ of the VM instances for a job for a particular
+ host. For example, not enough RAM on the host, too
+ many CPUs on the host, and so on.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>weight</glossterm>
+ <glossdef>
+ <para>Used by Object Storage storage devices to determine which
+ storage devices are suitable for the job. Devices
+ are weighted by size.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>weighted cost</glossterm>
+ <glossdef>
+ <para>The sum of each cost used when deciding where to
+ start a new VM instance in Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>worker</glossterm>
+ <glossdef>
+ <para>A daemon that listens to a queue and carries out tasks in response to messages. For example,
+ the <systemitem class="service">cinder-volume</systemitem> worker attaches
+ storage to instances.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .X. -->
+ <glossdiv>
+ <title>X</title>
+ <glossentry>
+ <glossterm>Xen API</glossterm>
+ <glossdef>
+ <para>The Xen administrative API, which is supported
+ by Compute.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Xen Cloud Platform (XCP)</glossterm>
+ <glossdef>
+ <para>An OpenStack-supported hypervisor.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Xen Storage Manager Volume Driver</glossterm>
+ <glossdef>
+ <para>A Block Storage volume plug-in that enables
+ communication with the Xen Storage Manager
+ API.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>XenServer</glossterm>
+ <glossdef>
+ <para>An OpenStack-supported hypervisor.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .Y. -->
+ <glossdiv>
+ <title>Y</title>
+ <glossentry>
+ <glossterm/>
+ <glossdef>
+ <para/>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- .Z. -->
+ <glossdiv>
+ <title>Z</title>
+ <glossentry>
+ <glossterm>ZeroMQ</glossterm>
+ <glossdef>
+ <para>Message queue software supported by OpenStack.
+ An alternative to RabbitMQ. Also spelled
+ 0MQ.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry>
+ <glossterm>Zuul</glossterm>
+ <glossdef>
+ <para>Tool used in OpenStack development to ensure
+ correctly ordered testing of changes in
+ parallel.</para>
+ </glossdef>
+ </glossentry>
+ </glossdiv>
+ <!-- ... -->
+</glossary>
Code Review / docs.git / commitdiff
