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From "dhruba borthakur (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4528) The put operation can release the rowlock before sync-ing the Hlog
Date Fri, 21 Oct 2011 21:58:33 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13133107#comment-13133107
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dhruba borthakur commented on HBASE-4528:
-----------------------------------------

Hi Ramkrisham I agree that the sync can occur from two places: from the rpc handler thread
or the background LogSyncer thread. That should not impact correctness, isn't it true?

I will upload a new patch that addresses your comments about this patch in reviewboard.
                
> 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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