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https://issues.apache.org/jira/browse/HBASE-4192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14080375#comment-14080375
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Sean Busbey commented on HBASE-4192:
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Part 1 was handled via HBASE-4487. Is Part 2 OBE from the changes in HBASE-8755?
> Optimize HLog for Throughput Using Delayed RPCs
> -----------------------------------------------
>
> Key: HBASE-4192
> URL: https://issues.apache.org/jira/browse/HBASE-4192
> Project: HBase
> Issue Type: New Feature
> Components: wal
> Affects Versions: 0.92.0
> Reporter: Vlad Dogaru
> Priority: Minor
>
> Introduce a new HLog configuration parameter (batchEntries) for more
> aggressive batching of appends. If this is enabled, HLog appends are not
> written to the HLog writer immediately, but batched and written either
> periodically or when a sync is requested. Because sync times become larger,
> they use delayed RPCs to free up RPC handler threads.
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