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https://issues.apache.org/jira/browse/HDFS-8619?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14596799#comment-14596799
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Zhe Zhang commented on HDFS-8619:
---------------------------------
Thanks Jing for the work! I think the analysis makes sense. I will review the
patch later today.
> 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-8619.000.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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