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  1. Hadoop Common
  2. HADOOP-6569

FsShell#cat should avoid calling unecessary getFileStatus before opening a file to read

    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.21.0
    • Component/s: fs
    • Labels:
      None
    • Hadoop Flags:
      Incompatible change, Reviewed

      Description

      Since FileSystem#open throws a FileNotFoundException when the file to be read does not exist, there is no need to check if the file is a directory or not before open. In case of HDFS, this could reduce one getFileInfo RPC to NameNode.

        Attachments

        1. optimizeCat.patch
          0.6 kB
          Hairong Kuang
        2. optimizeCat.patch
          0.6 kB
          Hairong Kuang
        3. optimizeCat-yahoo.patch
          0.7 kB
          Hairong Kuang
        4. optimizeCat-yahoo1.patch
          2 kB
          Hairong Kuang
        5. optimizeCat-yahoo2.patch
          3 kB
          Hairong Kuang

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              • Assignee:
                hairong Hairong Kuang
                Reporter:
                hairong Hairong Kuang
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                Dates

                • Created:
                  Updated:
                  Resolved: