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From "Jimmy Xiang (JIRA)" <>
Subject [jira] [Updated] (HIVE-8844) Choose a persisent policy for RDD caching [Spark Branch]
Date Sat, 15 Nov 2014 17:07:33 GMT


Jimmy Xiang updated HIVE-8844:
    Attachment: HIVE-8844.3-spark.patch

Per Xuefu's suggestion, we'd better not to make it configurable for now since Hive has already
too many configurations. So attached patch v3.

> Choose a persisent policy for RDD caching [Spark Branch]
> --------------------------------------------------------
>                 Key: HIVE-8844
>                 URL:
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Spark
>            Reporter: Xuefu Zhang
>            Assignee: Jimmy Xiang
>             Fix For: spark-branch
>         Attachments: HIVE-8844.1-spark.patch, HIVE-8844.2-spark.patch, HIVE-8844.3-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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