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https://issues.apache.org/jira/browse/HBASE-4528?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhruba borthakur updated HBASE-4528:
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Attachment: appendNoSyncPut6.txt
After some discussion with Ted and JGray, we decided that the rowlock is not
necessary for HRegion.rollbackMemstore. This is the version of the patch that
should satisfy all parties. Please review.
> The put operation can release the rowlock before sync-ing the Hlog
> ------------------------------------------------------------------
>
> Key: HBASE-4528
> URL: https://issues.apache.org/jira/browse/HBASE-4528
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Fix For: 0.94.0
>
> Attachments: appendNoSync5.txt, appendNoSyncPut1.txt,
> appendNoSyncPut2.txt, appendNoSyncPut3.txt, appendNoSyncPut4.txt,
> appendNoSyncPut5.txt, appendNoSyncPut6.txt
>
>
> This allows for better throughput when there are hot rows. A single row
> update improves from 100 puts/sec/server to 5000 puts/sec/server.
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