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Posted to issues@hbase.apache.org by "Jimmy Xiang (JIRA)" <ji...@apache.org> on 2013/05/03 21:52:16 UTC

[jira] [Updated] (HBASE-8420) Port HBASE-6874 Implement prefetching for scanners from 0.89-fb

     [ https://issues.apache.org/jira/browse/HBASE-8420?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jimmy Xiang updated HBASE-8420:
-------------------------------

    Attachment: 0.94-8420_v1.patch

In the 0.94 version, Scan is not touched since it breaks compatibility. So prefetching can be globally enabled or disabled.  I have ran all unit tests with prefetching enabled.  In the patch, it is disabled by default though.
                
> Port  HBASE-6874  Implement prefetching for scanners from 0.89-fb
> -----------------------------------------------------------------
>
>                 Key: HBASE-8420
>                 URL: https://issues.apache.org/jira/browse/HBASE-8420
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>         Attachments: 0.94-8420_v1.patch
>
>
> This should help scanner performance.  We should have it in trunk.

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