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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1939) HLog group commit
Date Sat, 06 Mar 2010 21:26:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12842317#action_12842317
] 

stack commented on HBASE-1939:
------------------------------

I applied Nicolas's HBASE-1939-20.4.patch above under the aegis of HBASE-2298.  It doesn't
look like TRUNK has the above issue calling sync (it don't use hdfs-200) but talking J-D in
case.

> HLog group commit
> -----------------
>
>                 Key: HBASE-1939
>                 URL: https://issues.apache.org/jira/browse/HBASE-1939
>             Project: Hadoop HBase
>          Issue Type: New Feature
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>             Fix For: 0.21.0
>
>         Attachments: HBASE-1939-20.4.patch, HBASE-1939-v2.patch, HBASE-1939-v3.patch,
HBASE-1939.patch
>
>
> Currently multiple clients writing to a RS are serialized when sync'ing their appends.
Implementing group commit can help this by being aware of all the clients in that queue.

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