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  1. Hadoop Common
  2. HADOOP-13946

Document how HDFS updates timestamps in the FS spec; compare with object stores

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Details

    • Improvement
    • Status: Resolved
    • Minor
    • Resolution: Fixed
    • 2.7.3
    • 2.8.0, 3.0.0-alpha4
    • documentation, fs
    • None
    • Reviewed

    Description

      SPARK-17159 shows that the behavior of when HDFS updates timestamps isn't well documented. Document these in the FS spec.

      I'm not going to add tests for this, as it is so very dependent on FS implementations, as in "POSIX filesystems may behave differently from HDFS". If someone knows what happens there, their contribution is welcome.

      Attachments

        1. HADOOP-13946-001.patch
          2 kB
          Steve Loughran
        2. HADOOP-13946-002.patch
          4 kB
          Steve Loughran
        3. HADOOP-13946-003.patch
          4 kB
          Steve Loughran
        4. HADOOP-13946-004.patch
          5 kB
          Steve Loughran
        5. HADOOP-13946-005.patch
          5 kB
          Mingliang Liu
        6. Screen Shot 2017-03-07 at 3.44.43 PM.png
          679 kB
          Mingliang Liu

        Issue Links

          relates to

          Improvement - An improvement or enhancement to an existing feature or task. SPARK-17159 Improve FileInputDStream.findNewFiles list performance

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Activity

            People

              stevel@apache.org Steve Loughran
              stevel@apache.org Steve Loughran
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              Dates

                Created:
                Updated:
                Resolved: