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Posted to hdfs-dev@hadoop.apache.org by "Yi Liu (JIRA)" <ji...@apache.org> on 2015/07/15 16:45:05 UTC

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

     [ https://issues.apache.org/jira/browse/HDFS-8619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yi Liu resolved HDFS-8619.
--------------------------
      Resolution: Fixed
    Hadoop Flags: Reviewed

Committed to branch, thanks Jing! Also thanks Zhe, Walter for review.

> 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
>         Attachments: HDFS-8619-HDFS-7285.001.patch, HDFS-8619.000.patch
>
>
> 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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