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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-18090) Improve TableSnapshotInputFormat to allow more multiple mappers per region
Date Mon, 02 Oct 2017 23:03:00 GMT

     [ https://issues.apache.org/jira/browse/HBASE-18090?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-18090:
--------------------------
    Fix Version/s:     (was: 2.0.0-alpha-4)
                       (was: 3.0.0)
                   2.0.0-beta-1

> 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
>    Affects Versions: 3.0.0
>            Reporter: Mikhail Antonov
>            Assignee: xinxin fan
>             Fix For: 2.0.0-beta-1
>
>         Attachments: HBASE-18090-branch-1.3-v1.patch, HBASE-18090-branch-1.3-v2.patch,
HBASE-18090-V3-master.patch, HBASE-18090-V4-master.patch, HBASE-18090-V5-master.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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