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From "Dave Latham (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9931) Optional setBatch for CopyTable to copy large rows in batches
Date Sat, 09 Nov 2013 07:15:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13818049#comment-13818049
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Dave Latham commented on HBASE-9931:
------------------------------------

Yeah - it's in the scans.  CopyTable doesn't use reducers at all.

> Optional setBatch for CopyTable to copy large rows in batches
> -------------------------------------------------------------
>
>                 Key: HBASE-9931
>                 URL: https://issues.apache.org/jira/browse/HBASE-9931
>             Project: HBase
>          Issue Type: Improvement
>          Components: mapreduce
>            Reporter: Dave Latham
>
> We've had CopyTable jobs fail because a small number of rows are wide enough to not fit
into memory.  If we could specify the batch size for CopyTable scans that shoud be able to
break those large rows up into multiple iterations to save the heap.



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