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Posted to hdfs-dev@hadoop.apache.org by "Arpit Agarwal (JIRA)" <ji...@apache.org> on 2014/08/21 03:38:35 UTC

[jira] [Created] (HDFS-6900) Eliminate DU thread per block pool slice

Arpit Agarwal created HDFS-6900:
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             Summary: Eliminate DU thread per block pool slice
                 Key: HDFS-6900
                 URL: https://issues.apache.org/jira/browse/HDFS-6900
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: datanode
    Affects Versions: 2.5.0
            Reporter: Arpit Agarwal


We use one DU thread per block pool slice to compute disk usage information. In addition to the thread overhead this results in the disk usage information being out of date for up to 10 minutes at a time. We can refresh it more frequently but then we'd be launching a shell command per block pool slice even more often.



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