Bug 2787: Batch AppendEntries to speed up follower sync 01/21701/6
authorTom Pantelis <tpanteli@brocade.com>
Tue, 2 Jun 2015 06:55:15 +0000 (02:55 -0400)
committerGerrit Code Review <gerrit@opendaylight.org>
Sat, 6 Jun 2015 18:38:23 +0000 (18:38 +0000)
commit6065ba82c90e366919a1b78105507b935b91af8e
tree2b14f8b410b1c3eea2a37a4c7d21955f9afbdc90
parentc154b24508a991092771901f0ee444e2c4ba096f
Bug 2787: Batch AppendEntries to speed up follower sync

AbstractLeader#sendUpdatesToFollower now attempts to send all entries
to the follower to catch it up with 1 AppendEntries message. However, we
don't want to send too large a message and risk exceeding akka's message
size limit. So I added another param, maxDataSize, to
ReplicatedLog#getFrom. It will attempt to add all entries up to
maxEntries but stops if the accumulated data size exceeds maxDataSize.

For maxDataSize, I reused the existing snapshotChunkSize (default 2M)
defined in ConfigParams. This currently is hard-coded - we may want to
make this configurable.

Change-Id: Ib2c1165c4140a36f4eada8f81b4261260615dd18
Signed-off-by: Tom Pantelis <tpanteli@brocade.com>
opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/AbstractReplicatedLogImpl.java
opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/DefaultConfigParamsImpl.java
opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/ReplicatedLog.java
opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/AbstractLeader.java
opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/AbstractReplicatedLogImplTest.java
opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/MockRaftActorContext.java
opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/RecoveryIntegrationTest.java
opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/behaviors/LeaderTest.java

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