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      Add a new conf "dfs.balancer.max-size-to-move" so that Balancer.MAX_SIZE_TO_MOVE becomes configurable.
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      Add a new conf "dfs.balancer.max-size-to-move" so that Balancer.MAX_SIZE_TO_MOVE becomes configurable.

    Description

      The original design of Balancer is intentionally to make it run slowly so that the balancing activities won't affect the normal cluster activities and the running jobs.

      There are new use case that cluster admin may choose to balance the cluster when the cluster load is low, or in a maintain window. So that we should have an option to allow Balancer to run faster.

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        1. bal1.png
          21 kB
          Kihwal Lee
        2. bal2.png
          16 kB
          Kihwal Lee
        3. h8818_20150723.patch
          20 kB
          Tsz-wo Sze
        4. h8818_20150727.patch
          20 kB
          Tsz-wo Sze
        5. HDFS-8818-branch-2.7.00.patch
          19 kB
          Zhe Zhang

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            szetszwo Tsz-wo Sze Assign to me
            szetszwo Tsz-wo Sze
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