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  1. Hadoop HDFS
  2. HDFS-14220

Enable Replica Placement Value Per Rack

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Duplicate
    • Affects Version/s: 2.7.1
    • Fix Version/s: None
    • Component/s: datanode
    • Labels:
      None

      Description

      By default, Replica placement per rack will be taken care by  BlockPlacementPolicyDefault.java .

      With 2 if conditions 

      1. numOfRacks <1 
      2. numOfRacks > 1

      and the placement will happen as 1 on localrack, 2 on remote rack.

      If a user needs max of 1 replica per rack then BlockPlacementPolicyDefault.java modification is needed instead we can add a property to specify the placement policy and replica value per rack.

       

       

        Attachments

        1. HDFS-14220-01.patch
          8 kB
          Ayush Saxena
        2. HDFS-14220-02.patch
          9 kB
          Ayush Saxena

          Issue Links

          duplicates

          New Feature - A new feature of the product, which has yet to be developed. HDFS-7891 A block placement policy with best rack failure tolerance

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved
          is related to

          Bug - A problem which impairs or prevents the functions of the product. HDFS-14546 Document block placement policies

          • Major - Major loss of function.
          • Patch Available

            Activity

              People

              • Assignee:
                ayushtkn Ayush Saxena
                Reporter:
                Amithsha Amithsha
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                Dates

                • Created:
                  Updated:
                  Resolved: