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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6372) Add scanner batching to Export job
Date Fri, 04 Jan 2013 12:08:15 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13543832#comment-13543832
] 

Hudson commented on HBASE-6372:
-------------------------------

Integrated in HBase-TRUNK-on-Hadoop-2.0.0 #329 (See [https://builds.apache.org/job/HBase-TRUNK-on-Hadoop-2.0.0/329/])
    HBASE-6694 Test scanner batching in export job feature from HBASE-6372 (Alexander Alten-Lorenz)
(Revision 1428772)

     Result = FAILURE
jmhsieh : 
Files : 
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/mapreduce/Export.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportExport.java

                
> 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: 0.94.2, 0.96.0
>            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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