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  1. Hadoop HDFS
  2. HDFS-11789

Maintain Short-Circuit Read Statistics

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 3.0.0-alpha4
    • Component/s: hdfs-client
    • Labels:
      None
    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      If a disk or controller hardware is faulty then short-circuit read requests can stall indefinitely while reading from the file descriptor. Currently there is no way to detect when short-circuit read requests are slow or blocked.

      This Jira proposes that each BlockReaderLocal maintain read statistics while it is active by measuring the time taken for a pre-determined fraction of read requests. These per-reader stats can be aggregated into global stats when the reader is closed. The aggregate statistics can be exposed via JMX.

        Attachments

        1. HDFS-11789.001.patch
          14 kB
          Hanisha Koneru
        2. HDFS-11789.002.patch
          29 kB
          Hanisha Koneru
        3. HDFS-11789.003.patch
          28 kB
          Hanisha Koneru
        4. HDFS-11789.004.patch
          28 kB
          Hanisha Koneru
        5. HDFS-11789.005.patch
          30 kB
          Hanisha Koneru

          Issue Links

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              • Assignee:
                hanishakoneru Hanisha Koneru
                Reporter:
                hanishakoneru Hanisha Koneru
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                Dates

                • Created:
                  Updated:
                  Resolved: