Reduce unnecessary DFSClient.rename() calls
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Key: HIVE-1852
URL: https://issues.apache.org/jira/browse/HIVE-1852
Project: Hive
Issue Type: Improvement
Reporter: Ning Zhang
Assignee: Ning Zhang
In Hive client side (MoveTask etc), DFSCleint.rename() is called for every file
inside a directory. It is very expensive for a large directory in a busy DFS
namenode. We should replace it with a single rename() call on the whole
directory.
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