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From "Xuefu Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-8219) Multi-Insert optimization, don't sink the source into a file [Spark Branch]
Date Mon, 22 Sep 2014 20:19:36 GMT
Xuefu Zhang created HIVE-8219:
---------------------------------

             Summary: Multi-Insert optimization, don't sink the source into a file [Spark
Branch]
                 Key: HIVE-8219
                 URL: https://issues.apache.org/jira/browse/HIVE-8219
             Project: Hive
          Issue Type: Bug
          Components: Spark
            Reporter: Xuefu Zhang


Current implementation split the operator plan at the lowest common ancester by inserting
one FileSinkOperator and a list of TableScanOperators. Writing to a file (by the FS) is expensive.
We should be able to insert a ReduceSinkOperator instead. The result RDD from the first job
can be cached and refereed in subsequent Spark jobs.

This is a followup for HIVE-7503.



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