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Posted to dev@hbase.apache.org by "Duo Zhang (Jira)" <ji...@apache.org> on 2021/06/05 15:03:00 UTC

[jira] [Resolved] (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 ]

Duo Zhang resolved HBASE-4914.
------------------------------
    Resolution: Won't Fix

> 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: Major
>
> 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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