[
https://issues.apache.org/jira/browse/RATIS-1042?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Marton Elek reassigned RATIS-1042:
----------------------------------
Assignee: Lokesh Jain
> Watch for commit calls are blocked for a long if no other message
> -----------------------------------------------------------------
>
> Key: RATIS-1042
> URL: https://issues.apache.org/jira/browse/RATIS-1042
> Project: Ratis
> Issue Type: Improvement
> Reporter: Marton Elek
> Assignee: Lokesh Jain
> Priority: Major
>
> I tested Ozone with freon key generator and teragen (2 mappers, 10G) and
> found that the during the teragen execution the Ozone client spends a lot of
> time waiting for the watchForCommit call.
> In ozone the minimum HB timeout is 5 seconds (max is 5.2) and the HB thread
> in GrpcLogAppender can sleep (min.hb.timeout / 2) if there is no outstanding
> requests. But we need faster response from the followers when we wait the
> results of watch for commit.
> Lokesh created a patch for me (thanks) which checks if the lastCommitIndex is
> the same on the follower and the leader and sends out additional heartbeats
> if they don't match.
> Ozone teragen 10 (mappers=2) performance is improved with 15% with this
> approach.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
