Hadoop HDFS
  1. Hadoop HDFS
  2. HDFS-2547

ReplicationTargetChooser has incorrect block placement comments

    Details

    • Type: Bug Bug
    • Status: Closed
    • Priority: Trivial Trivial
    • Resolution: Fixed
    • Affects Version/s: 0.20.1
    • Fix Version/s: 1.1.0
    • Component/s: namenode
    • Labels:
      None

      Description

      /** The class is responsible for choosing the desired number of targets
       * for placing block replicas.
       * The replica placement strategy is that if the writer is on a datanode,
       * the 1st replica is placed on the local machine, 
       * otherwise a random datanode. The 2nd replica is placed on a datanode
       * that is on a different rack. The 3rd replica is placed on a datanode
       * which is on the same rack as the **first replca**.
       */
      

      That should read "second replica". The test cases confirm that this is the behavior, as well as the docs.

      1. HDFS-2547.patch
        1 kB
        Harsh J
      2. HDFS-2547.patch
        0.8 kB
        Harsh J

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          People

          • Assignee:
            Harsh J
            Reporter:
            Harsh J
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            Dates

            • Created:
              Updated:
              Resolved:

              Development