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  1. Hadoop Common
  2. HADOOP-6569

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

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 0.21.0
    • fs
    • None
    • 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-yahoo.patch
          0.7 kB
          Hairong Kuang
        3. optimizeCat-yahoo1.patch
          2 kB
          Hairong Kuang
        4. optimizeCat-yahoo2.patch
          3 kB
          Hairong Kuang
        5. optimizeCat.patch
          0.6 kB
          Hairong Kuang

        Issue Links

          is related to

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-1016 HDFS side change for HADOOP-6569

          • Major - Major loss of function.
          • Closed

          Activity

            People

              hairong Hairong Kuang
              hairong Hairong Kuang
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              Dates

                Created:
                Updated:
                Resolved: