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Posted to mapreduce-dev@hadoop.apache.org by "Scott Chen (JIRA)" <ji...@apache.org> on 2010/05/28 20:48:38 UTC

[jira] Created: (MAPREDUCE-1823) Reduce the number of calls of HarFileSystem.getFileStatus in RaidNode

Reduce the number of calls of HarFileSystem.getFileStatus in RaidNode
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                 Key: MAPREDUCE-1823
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1823
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
    Affects Versions: 0.22.0
            Reporter: Scott Chen
            Assignee: Scott Chen
             Fix For: 0.22.0


RaidNode makes lots of calls of HarFileSystem.getFileStatus. This method fetches information from DataNode so it is slow. It becomes the bottleneck of the RaidNode. It will be nice if we can make this more efficient.

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