[jira] [Assigned] (DRILL-1346) Use HBase table size information to improve scan parallelization

["Aditya Kishore (JIRA)" <ji...@apache.org>]

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

Aditya Kishore reassigned DRILL-1346:
-------------------------------------

    Assignee: Aditya Kishore  (was: DrillCommitter)

> 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
>             Fix For: 0.5.0
>
>         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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