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  1. Hadoop HDFS
  2. HDFS-8432

Introduce a minimum compatible layout version to allow downgrade in more rolling upgrade use cases.

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    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      Maintain the prior layout version during the upgrade window and reject attempts to use new features until after the upgrade has been finalized. This guarantees that the prior software version can read the fsimage and edit logs if the administrator decides to downgrade. This will make downgrade usable for the majority of NameNode layout version changes, which just involve introduction of new edit log operations.

        Attachments

        1. HDFS-8432.001.patch
          41 kB
          Chris Nauroth
        2. HDFS-8432.002.patch
          42 kB
          Chris Nauroth
        3. HDFS-8432-branch-2.002.patch
          41 kB
          Chris Nauroth
        4. HDFS-8432-branch-2.003.patch
          41 kB
          Chris Nauroth
        5. HDFS-8432-HDFS-Downgrade-Extended-Support.pdf
          80 kB
          Chris Nauroth

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              • Assignee:
                cnauroth Chris Nauroth
                Reporter:
                cnauroth Chris Nauroth
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                • Created:
                  Updated:
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