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From "Alexander Alten-Lorenz (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6372) Add scanner batching to Export job
Date Tue, 14 Aug 2012 20:11:38 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13434458#comment-13434458
] 

Alexander Alten-Lorenz commented on HBASE-6372:
-----------------------------------------------

[INFO] Reactor Summary:
[INFO] 
[INFO] HBase ............................................. SUCCESS [47.617s]
[INFO] HBase - Common .................................... SUCCESS [1.882s]
[INFO] HBase - Hadoop Compatibility ...................... SUCCESS [0.744s]
[INFO] HBase - Hadoop One Compatibility .................. SUCCESS [0.858s]
[INFO] HBase - Server .................................... SUCCESS [14.455s]
[INFO] HBase - Hadoop Two Compatibility .................. SUCCESS [4.098s]
[INFO] HBase - Integration Tests ......................... SUCCESS [1.408s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1:13.508s
[INFO] Finished at: Tue Aug 14 12:47:05 PDT 2012
[INFO] Final Memory: 42M/184M

                
> Add scanner batching to Export job
> ----------------------------------
>
>                 Key: HBASE-6372
>                 URL: https://issues.apache.org/jira/browse/HBASE-6372
>             Project: HBase
>          Issue Type: Improvement
>          Components: mapreduce
>    Affects Versions: 0.96.0, 0.94.2
>            Reporter: Lars George
>            Assignee: Shengsheng Huang
>            Priority: Minor
>              Labels: newbie
>         Attachments: HBASE-6372.2.patch, HBASE-6372.3.patch, HBASE-6372.4.patch, HBASE-6372.5.patch,
HBASE-6372.patch
>
>
> When a single row is too large for the RS heap then an OOME can take out the entire RS.
Setting scanner batching in custom scans helps avoiding this scenario, but for the supplied
Export job this is not set.
> Similar to HBASE-3421 we can set the batching to a low number - or if needed make it
a command line option.

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