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https://issues.apache.org/jira/browse/HBASE-11684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14087252#comment-14087252
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Tianying Chang commented on HBASE-11684:
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[~jdcryans] Can you give some comments on this?
> HBase replicationSource should support multithread to ship the log entry
> ------------------------------------------------------------------------
>
> Key: HBASE-11684
> URL: https://issues.apache.org/jira/browse/HBASE-11684
> Project: HBase
> Issue Type: Improvement
> Components: Performance, regionserver, Replication
> Reporter: Tianying Chang
> Assignee: Tianying Chang
>
> We found the replication rate cannot keep up with the write rate when the
> master cluster is write heavy. We got huge log queue build up due to that.
> But when we do a rolling restart of master cluster, we found that the
> appliedOpsRate doubled due to the extra thread created to help recover the
> log of the restarted RS. ReplicateLogEntries is a synchronous blocking call,
> it becomes the bottleneck when is only runs with one thread. I think we
> should support multi-thread for the replication source to ship the data. I
> don't see any consistency problem. Any other concern here?
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