Xuefu Zhang created HIVE-8844:
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Summary: 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
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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