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Merge pull request #2241 from peterrosell/correct_defaults_in_tuning

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Correct defaults for heartbeat and election
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Xiang Li 2015-02-06 07:41:47 -08:00
commit e2feafc741
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Documentation/tuning.md
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@ -11,11 +11,11 @@ The underlying distributed consensus protocol relies on two separate time parame
The first parameter is called the *Heartbeat Interval*.
This is the frequency with which the leader will notify followers that it is still the leader.
etcd batches commands together for higher throughput so this heartbeat interval is also a delay for how long it takes for commands to be committed.
By default, etcd uses a `50ms` heartbeat interval.
By default, etcd uses a `100ms` heartbeat interval.
The second parameter is the *Election Timeout*.
This timeout is how long a follower node will go without hearing a heartbeat before attempting to become leader itself.
By default, etcd uses a `200ms` election timeout.
By default, etcd uses a `1000ms` election timeout.
Adjusting these values is a trade off.
Lowering the heartbeat interval will cause individual commands to be committed faster but it will lower the overall throughput of etcd.