harchive: Reduce the number of open calls to _index and _masterindex
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Key: MAPREDUCE-865
URL: https://issues.apache.org/jira/browse/MAPREDUCE-865
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: harchive
Reporter: Koji Noguchi
Priority: Minor
When I have har file with 1000 files in it,
% hadoop dfs -lsr har:///user/knoguchi/myhar.har/
would open/read/close the _index/_masterindex files 1000 times.
This makes the client slow and add some load to the namenode as well.
Any ways to reduce this number?
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