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  1. Hadoop HDFS
  2. HDFS-5535 Umbrella jira for improved HDFS rolling upgrades
  3. HDFS-5889

When rolling upgrade is in progress, standby NN should create checkpoint for downgrade.

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    • Hadoop Flags:
      Reviewed

      Description

      After rolling upgrade is started and checkpoint is disabled, the edit log may grow to a huge size. It is not a problem if rolling upgrade is finalized normally since NN keeps the current state in memory and it writes a new checkpoint during finalize. However, it is a problem if admin decides to downgrade. It could take a long time to apply edit log. Rollback does not have such problem.

        Attachments

        1. h5889_20140213.patch
          35 kB
          Tsz Wo Nicholas Sze
        2. h5889_20140212c.patch
          37 kB
          Jing Zhao
        3. h5889_20140212b.patch
          34 kB
          Tsz Wo Nicholas Sze
        4. h5889_20140211.patch
          19 kB
          Tsz Wo Nicholas Sze

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            People

            • Assignee:
              szetszwo Tsz Wo Nicholas Sze
              Reporter:
              szetszwo Tsz Wo Nicholas Sze
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              • Created:
                Updated:
                Resolved: