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https://issues.apache.org/jira/browse/HDFS-8415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15023429#comment-15023429
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Tsz Wo Nicholas Sze commented on HDFS-8415:
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What the tradeoffs do you mean?
> Erasure coding: rotated parity placement (RAID5/6)
> --------------------------------------------------
>
> Key: HDFS-8415
> URL: https://issues.apache.org/jira/browse/HDFS-8415
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Zhe Zhang
> Assignee: Zhe Zhang
>
> Our current implementation uses fixed internal blocks for parity data,
> similar to RAID3. Rotated parity placement like RAID5/6 has interesting
> tradeoffs that we should investigate.
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