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From "xinxin fan (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HBASE-18090) Improve TableSnapshotInputFormat to allow more multiple mappers per region
Date Thu, 09 Nov 2017 23:58:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16246793#comment-16246793
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xinxin fan edited comment on HBASE-18090 at 11/9/17 11:57 PM:
--------------------------------------------------------------

Manually triggered QA retry to build branch-1.


was (Author: xinxin fan):
Manually triggered QA retry.

> Improve TableSnapshotInputFormat to allow more multiple mappers per region
> --------------------------------------------------------------------------
>
>                 Key: HBASE-18090
>                 URL: https://issues.apache.org/jira/browse/HBASE-18090
>             Project: HBase
>          Issue Type: Improvement
>          Components: mapreduce
>            Reporter: Mikhail Antonov
>            Assignee: xinxin fan
>             Fix For: 2.0.0-beta-1
>
>         Attachments: HBASE-18090-V3-master.patch, HBASE-18090-V4-master.patch, HBASE-18090-V5-master.patch,
HBASE-18090-branch-1.3-v1.patch, HBASE-18090-branch-1.3-v2.patch, HBASE-18090.branch-1.patch
>
>
> TableSnapshotInputFormat runs one map task per region in the table snapshot. This places
unnecessary restriction that the region layout of the original table needs to take the processing
resources available to MR job into consideration. Allowing to run multiple mappers per region
(assuming reasonably even key distribution) would be useful.



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