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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6372) Add scanner batching to Export job
Date Thu, 30 Aug 2012 04:33:08 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13444668#comment-13444668
] 

stack commented on HBASE-6372:
------------------------------

Added HBASE-6694 to address issue raised by Jon above.
                
> 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
>             Fix For: 0.96.0
>
>         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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