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  1. Hadoop HDFS
  2. HDFS-2080

Speed up DFS read path by lessening checksum overhead

    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.23.0
    • Fix Version/s: 0.23.1
    • Component/s: hdfs-client, performance
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      I've developed a series of patches that speeds up the HDFS read path by a factor of about 2.5x (~300M/sec to ~800M/sec for localhost reading from buffer cache) and also will make it easier to allow for advanced users (eg hbase) to skip a buffer copy.

        Attachments

        1. hdfs-2080.txt
          142 kB
          Todd Lipcon
        2. hdfs-2080.txt
          134 kB
          Todd Lipcon

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              • Assignee:
                tlipcon Todd Lipcon
                Reporter:
                tlipcon Todd Lipcon
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                • Created:
                  Updated:
                  Resolved: