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  1. Hadoop HDFS
  2. HDFS-528

Add ability for safemode to wait for a minimum number of live datanodes

    Details

    • Type: New Feature
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.22.0
    • Fix Version/s: 0.22.0, 1.1.1
    • Component/s: scripts
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      When starting up a fresh cluster programatically, users often want to wait until DFS is "writable" before continuing in a script. "dfsadmin -safemode wait" doesn't quite work for this on a completely fresh cluster, since when there are 0 blocks on the system, 100% of them are accounted for before any DNs have reported.

      This JIRA is to add a command which waits until a certain number of DNs have reported as alive to the NN.

        Attachments

        1. hdfs-528-v4.txt
          18 kB
          Eli Collins
        2. hdfs-528-v3.txt
          15 kB
          Todd Lipcon
        3. hdfs-528-v2.txt
          15 kB
          Todd Lipcon
        4. hdfs-528.txt
          8 kB
          Todd Lipcon
        5. hdfs-528.txt
          17 kB
          Todd Lipcon
        6. h528_20120731_b-1.patch
          9 kB
          Tsz Wo Nicholas Sze

          Activity

            People

            • Assignee:
              tlipcon Todd Lipcon
              Reporter:
              tlipcon Todd Lipcon
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              Dates

              • Created:
                Updated:
                Resolved: