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Posted to issues@carbondata.apache.org by "kumar vishal (JIRA)" <ji...@apache.org> on 2017/07/19 18:34:00 UTC
[jira] [Commented] (CARBONDATA-1291) CarbonData query performace
improvement when number of carbon blocks are high
[ 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:
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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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