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Posted to dev@hive.apache.org by "Paul Yang (Commented) (JIRA)" <ji...@apache.org> on 2011/10/25 22:16:32 UTC
[jira] [Commented] (HIVE-2368) Slow dropping of partitions caused
by full listing of storage descriptors
[ https://issues.apache.org/jira/browse/HIVE-2368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13135386#comment-13135386 ]
Paul Yang commented on HIVE-2368:
---------------------------------
+1
> Slow dropping of partitions caused by full listing of storage descriptors
> -------------------------------------------------------------------------
>
> Key: HIVE-2368
> URL: https://issues.apache.org/jira/browse/HIVE-2368
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Reporter: Sohan Jain
> Fix For: 0.9.0
>
> Attachments: HIVE-2368.1.patch
>
>
> To determine if a column descriptor is unused, we call listStorageDescriptorsWithCD(), which may return a big list of SDs. This can severely slow down dropping partitions.
> We can add a maximum number of SDs to return, and just ask for 1 SD, since we are just doing an existential check.
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