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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-8415) Erasure coding: rotated parity placement (RAID5/6)
Date Wed, 18 Jan 2017 23:00:28 GMT

     [ https://issues.apache.org/jira/browse/HDFS-8415?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Wang updated HDFS-8415:
------------------------------
    Component/s: erasure-coding

> 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
>          Components: erasure-coding
>            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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