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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-1584) Ensure stats are correct if simultaneous split and merge
Date Thu, 15 Jan 2015 07:04:34 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-1584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14278360#comment-14278360
] 

ramkrishna.s.vasudevan commented on PHOENIX-1584:
-------------------------------------------------

When the stats is calculated during compaction it is an absolute measure.  But during splits
we have an approximation while calculating the percentage.  That leads to this variation.



> Ensure stats are correct if simultaneous split and merge
> --------------------------------------------------------
>
>                 Key: PHOENIX-1584
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-1584
>             Project: Phoenix
>          Issue Type: Sub-task
>            Reporter: James Taylor
>            Assignee: ramkrishna.s.vasudevan
>
> During splits, we update the rowCount and byteCount via StatisticsWriter.splitStats()
and at the same time compaction also updates the stats. So we are not able to get a consistent
result for the rowCount and byteCount under these conditions.  So for now these are not asserted
when doing a select from the STATS table in the statistics unit tests.  However on the client
side it is asserted. All tests passes with this.



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