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Posted to hdfs-dev@hadoop.apache.org by "Jing Zhao (JIRA)" <ji...@apache.org> on 2015/06/18 02:23:02 UTC

[jira] [Created] (HDFS-8619) Erasure Coding: revisit replica counting for striped blocks

Jing Zhao created HDFS-8619:
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             Summary: Erasure Coding: revisit replica counting for striped blocks
                 Key: HDFS-8619
                 URL: https://issues.apache.org/jira/browse/HDFS-8619
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Jing Zhao
            Assignee: Jing Zhao


Currently we use the same {{BlockManager#countNodes}} method for striped blocks, which simply treat each internal block as a replica. However, for a striped block, we may have more complicated scenario, e.g., we have multiple replicas of the first internal block while we miss some other internal blocks. Using the current {{countNodes}} methods can lead to wrong decision in these scenarios.



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