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From "Jonathan Gray (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4528) The put operation can release the rowlock before sync-ing the Hlog
Date Thu, 02 Feb 2012 22:49:02 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13199312#comment-13199312
] 

Jonathan Gray commented on HBASE-4528:
--------------------------------------

@Mubarek, since it's a performance optimization and new feature, it's not going to be committed
into the 90/92 branches.  That being said, this patch could be backported if someone wanted
to use it on a 92 branch (90 might be significantly more difficult, not sure).
                
> 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: 4528-trunk-v9.txt, 4528-trunk.txt, 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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