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From "Lars Hofhansl (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4914) Enhance MapReduce TableInputFormat to Support N-mappers per Region
Date Wed, 21 Mar 2012 17:03:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13234505#comment-13234505

Lars Hofhansl commented on HBASE-4914:

Again, this does not look like a 0.94 blocker.
> Enhance MapReduce TableInputFormat to Support N-mappers per Region
> ------------------------------------------------------------------
>                 Key: HBASE-4914
>                 URL: https://issues.apache.org/jira/browse/HBASE-4914
>             Project: HBase
>          Issue Type: Sub-task
>          Components: client, regionserver
>            Reporter: Nicolas Spiegelberg
>            Priority: Blocker
>             Fix For: 0.94.0
> Current TableInputFormat based MR jobs create exactly one mapper per region where each
mapper sets one Scan with appropriate start/stop row keys. This change allows jobs to be run
with any number of mappers per region, so that when a mapper fails, there will be less data
to be reprocessed.

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