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https://issues.apache.org/jira/browse/HDFS-8032?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14605576#comment-14605576
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Walter Su commented on HDFS-8032:
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You should be careful with block group whose size smaller than a full stripe.
> Erasure coding: shrink size of indices in BlockInfoStriped
> ----------------------------------------------------------
>
> Key: HDFS-8032
> URL: https://issues.apache.org/jira/browse/HDFS-8032
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Zhe Zhang
> Assignee: Zhe Zhang
>
> In a _m+k_ erasure coding schema, the first _(m+k)_ slots in
> {{BlockInfoStriped}} do not need indexing, since the _ith_ storage directly
> maps to the _ith_ block in the erasure coding block group.
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