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From "Josh Wills (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CRUNCH-230) Attempt to estimate HBase table sizes when we're given a trivial Scan object
Date Tue, 12 Nov 2013 16:59:22 GMT

    [ https://issues.apache.org/jira/browse/CRUNCH-230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13820242#comment-13820242
] 

Josh Wills commented on CRUNCH-230:
-----------------------------------

Seems useful and straightforward to me. My week is sort of shot, but I should have time to
cook something up this weekend if someone else doesn't beat me to it.

> Attempt to estimate HBase table sizes when we're given a trivial Scan object
> ----------------------------------------------------------------------------
>
>                 Key: CRUNCH-230
>                 URL: https://issues.apache.org/jira/browse/CRUNCH-230
>             Project: Crunch
>          Issue Type: Improvement
>          Components: IO
>    Affects Versions: 0.6.0
>            Reporter: Josh Wills
>            Priority: Minor
>         Attachments: CRUNCH-230.patch
>
>
> If we're asked to do a scan of an entire HBase table, we can actually do a pretty good
job of estimating how large it is by looking up its directory in HDFS. This patch checks the
input scan given to the HBaseSourceTarget, and if it doesn't specify any filters, looks up
the size of the input table on HDFS.



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