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From "kumar vishal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CARBONDATA-1291) CarbonData query performace improvement when number of carbon blocks are high
Date Wed, 19 Jul 2017 18:34:00 GMT

    [ https://issues.apache.org/jira/browse/CARBONDATA-1291?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16093570#comment-16093570
] 

kumar vishal commented on CARBONDATA-1291:
------------------------------------------

When number of blocks are high, driver will check availability for deleted delta file for
each block. As file list operation is quite expensive,it is hitting the query performance.

To avoid this driver can check whether table is updated and if not then no need to check for
deleted files

> CarbonData query performace improvement when number of carbon blocks are high
> -----------------------------------------------------------------------------
>
>                 Key: CARBONDATA-1291
>                 URL: https://issues.apache.org/jira/browse/CARBONDATA-1291
>             Project: CarbonData
>          Issue Type: Bug
>            Reporter: kumar vishal
>            Assignee: kumar vishal
>
> When number of carbon blocks are high query performance is bad 



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