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Posted to issues@hbase.apache.org by "Lars Hofhansl (JIRA)" <ji...@apache.org> on 2014/11/17 00:30:34 UTC

[jira] [Commented] (HBASE-12031) Parallel Scanners inside Region

    [ https://issues.apache.org/jira/browse/HBASE-12031?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14214130#comment-14214130 ] 

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

Related perhaps: HBASE-12411. (I attached a simple patch there has compactions use private StoreFiles - and thus readers).

> 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: 2.0.0
>
>         Attachments: HBASE-12031.2.patch, HBASE-12031.3.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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