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Posted to issues@kudu.apache.org by "Adar Dembo (JIRA)" <ji...@apache.org> on 2017/04/13 02:53:41 UTC

[jira] [Created] (KUDU-1973) Coalesce RPCs destined for the same server

Adar Dembo created KUDU-1973:
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             Summary: Coalesce RPCs destined for the same server
                 Key: KUDU-1973
                 URL: https://issues.apache.org/jira/browse/KUDU-1973
             Project: Kudu
          Issue Type: Sub-task
          Components: rpc, tserver
    Affects Versions: 1.4.0
            Reporter: Adar Dembo


The krpc subsystem ensures that only one _connection_ exists between any pair of nodes, but it doesn't coalesce the _RPCs_ themselves. In clusters with dense nodes (especially with a lot of tablets), there's often a great number of RPCs sent between pairs of nodes.

We should explore ways of coalescing those RPCs. I don't know whether that would happen within the krpc system itself (i.e. in a payload-agnostic way), or whether we'd only coalesce RPCs known to be "hot" (like UpdateConsensus).



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