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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12031) Parallel Scanners inside Region
Date Mon, 22 Sep 2014 23:18:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12031?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14144010#comment-14144010
] 

Lars Hofhansl commented on HBASE-12031:
---------------------------------------

Sorry to be pedantic... .2 still has the messed up whitespace (tabs instead of 2 spaces).

> Parallel Scanners inside Region
> -------------------------------
>
>                 Key: HBASE-12031
>                 URL: https://issues.apache.org/jira/browse/HBASE-12031
>             Project: HBase
>          Issue Type: New Feature
>          Components: Performance, Scanners
>    Affects Versions: 0.98.6
>            Reporter: Vladimir Rodionov
>            Assignee: Vladimir Rodionov
>             Fix For: 1.0.0, 2.0.0, 0.98.7, 0.99.1
>
>         Attachments: HBASE-12031.2.patch, HBASE-12031.patch, ParallelScannerDesign.pdf,
hbase-12031-tests.tar.gz
>
>
> This JIRA to improve performance of multiple scanners running on a same region in parallel.
The scenarios where we will get the performance benefits:
> * New TableInputFormat with input splits smaller than HBase Region.
> * Scanning during compaction (Compaction scanner and application scanner over the same
Region).
> Some JIRAs related to this one:
> https://issues.apache.org/jira/browse/HBASE-7336
> https://issues.apache.org/jira/browse/HBASE-5979 



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