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Posted to dev@hive.apache.org by "Jimmy Xiang (JIRA)" <ji...@apache.org> on 2014/11/15 01:30:34 UTC
[jira] [Updated] (HIVE-8844) Choose a persisent policy for RDD
caching [Spark Branch]
[ https://issues.apache.org/jira/browse/HIVE-8844?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jimmy Xiang updated HIVE-8844:
------------------------------
Attachment: HIVE-8844.1-spark.patch
Attached a patch that make the storage level configurable with default memory+disk.
> Choose a persisent policy for RDD caching [Spark Branch]
> --------------------------------------------------------
>
> Key: HIVE-8844
> URL: https://issues.apache.org/jira/browse/HIVE-8844
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Reporter: Xuefu Zhang
> Assignee: Jimmy Xiang
> Attachments: HIVE-8844.1-spark.patch
>
>
> RDD caching is used for performance reasons in some multi-insert queries. Currently, we call RDD.cache(), which indicates a persistency policy of using memory only. We should choose a better policy. I think memory+disk will be good enough. Refer to RDD.persist() for more information.
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