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  1. Hadoop HDFS
  2. HDFS-1094

Intelligent block placement policy to decrease probability of block loss

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Details

    • Improvement
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • namenode
    • None

    Description

      The current HDFS implementation specifies that the first replica is local and the other two replicas are on any two random nodes on a random remote rack. This means that if any three datanodes die together, then there is a non-trivial probability of losing at least one block in the cluster. This JIRA is to discuss if there is a better algorithm that can lower probability of losing a block.

      Attachments

        1. calculate_probs.py
          2 kB
          Rodrigo Schmidt
        2. failure_rate.py
          11 kB
          Rodrigo Schmidt
        3. prob.pdf
          67 kB
          Aravind Menon
        4. prob.pdf
          67 kB
          Aravind Menon

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              rschmidt Rodrigo Schmidt
              dhruba Dhruba Borthakur
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              Dates

                Created:
                Updated: