Hadoop HDFS
  1. Hadoop HDFS
  2. HDFS-4508

Two minor improvements to the QJM Deployment docs

    Details

    • Type: Bug Bug
    • Status: Open
    • Priority: Minor Minor
    • Resolution: Unresolved
    • Affects Version/s: 2.0.3-alpha
    • Fix Version/s: None
    • Component/s: documentation
    • Labels:
      None

      Description

      Suggested by ML user Azurry, the docs at http://hadoop.apache.org/docs/current/hadoop-yarn/hadoop-yarn-site/HDFSHighAvailabilityWithQJM.html#Deployment_details can be improved for two specific lines:

      • If you have already formatted the NameNode, or are converting a non-HA-enabled cluster to be HA-enabled, you should now copy over the contents of your NameNode metadata directories to the other, unformatted NameNode by running the command "hdfs namenode -bootstrapStandby" on the unformatted NameNode. Running this command will also ensure that the JournalNodes (as configured by dfs.namenode.shared.edits.dir) contain sufficient edits transactions to be able to start both NameNodes.
      • If you are converting a non-HA NameNode to be HA, you should run the command "hdfs -initializeSharedEdits", which will initialize the JournalNodes with the edits data from the local NameNode edits directories.
      1. HDFS-4508.patch
        2 kB
        Daisuke Kobayashi

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          • Assignee:
            Daisuke Kobayashi
            Reporter:
            Harsh J
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            Dates

            • Created:
              Updated:

              Development