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https://issues.apache.org/jira/browse/HBASE-4528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13137570#comment-13137570
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Jonathan Gray commented on HBASE-4528:
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+1 on adding the log line Ted. Will do.
I will try to spend time looking at the unit test tonight.
> 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: HBASE-4528-Trunk-FINAL.patch, appendNoSync5.txt,
> appendNoSyncPut1.txt, appendNoSyncPut2.txt, appendNoSyncPut3.txt,
> appendNoSyncPut4.txt, appendNoSyncPut5.txt, appendNoSyncPut6.txt,
> appendNoSyncPut7.txt, appendNoSyncPut8.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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