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Posted to issues@hbase.apache.org by "Nicolas Spiegelberg (Updated) (JIRA)" <ji...@apache.org> on 2011/12/01 00:29:41 UTC
[jira] [Updated] (HBASE-4914) Enhance MapReduce TableInputFormat to
Support N-mappers per Region
[ https://issues.apache.org/jira/browse/HBASE-4914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Nicolas Spiegelberg updated HBASE-4914:
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Description: 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.
Priority: Minor (was: Major)
Summary: Enhance MapReduce TableInputFormat to Support N-mappers per Region (was: Support N-mappers per Region)
Need to port from 89-fb. See SVN #1181607
> 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: Minor
> 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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