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Posted to mapreduce-dev@hadoop.apache.org by "Xiao Kang (JIRA)" <ji...@apache.org> on 2010/06/23 17:25:52 UTC

[jira] Created: (MAPREDUCE-1891) Disk io of shuffle phase may decrease if shuffled data not decompressed

Disk io of shuffle phase may decrease if shuffled data not decompressed
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                 Key: MAPREDUCE-1891
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1891
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: tasktracker
            Reporter: Xiao Kang


Current shuffled data is decompressed immediately. It may use much less memory for shuffle buffer if the data is not decompressed until merging to disk.

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