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  1. Hadoop HDFS
  2. HDFS-2121

Add ability to create block replicas during off-switch reads

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Details

    • New Feature
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
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    Description

      Idea: when a DFSClient reads an off-switch replica, we could tee an extra, temporal replica to the local DN if the NN thinks it makes sense.

      Then we could delete the ones which were part of the original 2 on the rack to rebalance or just rely on the balancer... all this would ensure better spread across the cluster. This would also help with hotspots on datasets.

      Thoughts?

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          relates to

          New Feature - A new feature of the product, which has yet to be developed. HDFS-4606 HDFS API to move file replicas to caller's location

          • Major - Major loss of function.
          • Open

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              Unassigned Unassigned
              acmurthy Arun Murthy
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              Dates

                Created:
                Updated: