Cache HAR filesystem metadata
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Key: MAPREDUCE-2459
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2459
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: harchive
Reporter: Mac Yang
Assignee: Mac Yang
Each HAR file system has two index files that contains information on how files
are stored in the part files. During the block location calculation, these
indexes are reread for every file in the archive. Caching the indexes and the
status of the part files will greatly reduce the number of name node operations
during the job setup time.
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