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  1. Hadoop HDFS
  2. HDFS-8914

Document HA support in the HDFS HdfsDesign.md

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.7.1
    • Fix Version/s: 2.8.0, 2.7.3, 3.0.0-alpha1
    • Component/s: documentation
    • Labels:
      None
    • Environment:

      Documentation page in live

    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      Please refer to these two links and correct one of them.

      http://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-hdfs/HdfsDesign.html

      The NameNode machine is a single point of failure for an HDFS cluster. If the NameNode machine fails, manual intervention is necessary. Currently, automatic restart and failover of the NameNode software to another machine is not supported.

      http://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.html

      The HDFS High Availability feature addresses the above problems by providing the option of running two redundant NameNodes in the same cluster in an Active/Passive configuration with a hot standby. This allows a fast failover to a new NameNode in the case that a machine crashes, or a graceful administrator-initiated failover for the purpose of planned maintenance.

      Please update hdfsDesign article with same facts to avoid confusion in Reader's mind..

        Attachments

        1. HDFS-8914.1.patch
          2 kB
          Lars Francke
        2. HDFS-8914.2.patch
          2 kB
          Lars Francke

          Activity

            People

            • Assignee:
              lars_francke Lars Francke
              Reporter:
              sunrise76 Ravindra Babu
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              • Created:
                Updated:
                Resolved: