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From "Aditya Kishore (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-1346) Use HBase table size information to improve scan parallelization
Date Fri, 29 Aug 2014 19:27:53 GMT

     [ https://issues.apache.org/jira/browse/DRILL-1346?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aditya Kishore updated DRILL-1346:
----------------------------------

    Attachment: 0001-DRILL-1346-Use-HBase-table-size-information-to-impro.patch

Patch also available at https://reviews.apache.org/r/25190/ for review.

> Use HBase table size information to improve scan parallelization
> ----------------------------------------------------------------
>
>                 Key: DRILL-1346
>                 URL: https://issues.apache.org/jira/browse/DRILL-1346
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Storage - HBase
>    Affects Versions: 0.5.0
>            Reporter: Aditya Kishore
>            Assignee: Aditya Kishore
>            Priority: Critical
>         Attachments: 0001-DRILL-1346-Use-HBase-table-size-information-to-impro.patch
>
>
> Currently we use a pseudo-estimated value to calculate the scan size which does not take
the actual size of data into account.
> HBase, through {{o.a.h.h.client.HBaseAdmin.getClusterStatus()}}, provides a way to retrieve
the actual data size of each region. We can use this to approximate the size of scan and use
it to improve the scan parallelization.



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