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Posted to hdfs-dev@hadoop.apache.org by "Zhe Zhang (JIRA)" <ji...@apache.org> on 2015/05/12 06:17:01 UTC

[jira] [Resolved] (HDFS-7678) Erasure coding: DFSInputStream with decode functionality (pread)

     [ https://issues.apache.org/jira/browse/HDFS-7678?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zhe Zhang resolved HDFS-7678.
-----------------------------
       Resolution: Fixed
    Fix Version/s: HDFS-7285
     Hadoop Flags: Reviewed

> Erasure coding: DFSInputStream with decode functionality (pread)
> ----------------------------------------------------------------
>
>                 Key: HDFS-7678
>                 URL: https://issues.apache.org/jira/browse/HDFS-7678
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: HDFS-7285
>            Reporter: Li Bo
>            Assignee: Zhe Zhang
>             Fix For: HDFS-7285
>
>         Attachments: BlockGroupReader.patch, HDFS-7678-HDFS-7285.002.patch, HDFS-7678-HDFS-7285.003.patch, HDFS-7678-HDFS-7285.004.patch, HDFS-7678-HDFS-7285.005.patch, HDFS-7678-HDFS-7285.006.patch, HDFS-7678-HDFS-7285.007.patch, HDFS-7678-HDFS-7285.008.patch, HDFS-7678-HDFS-7285.009.patch, HDFS-7678-HDFS-7285.010.patch, HDFS-7678-HDFS-7285.012.patch, HDFS-7678-HDFS-7285.013.patch, HDFS-7678-HDFS-7285.014.patch, HDFS-7678.000.patch, HDFS-7678.001.patch
>
>
> A block group reader will read data from BlockGroup no matter in striping layout or contiguous layout. The corrupt blocks can be known before reading(told by namenode), or just be found during reading. The block group reader needs to do decoding work when some blocks are found corrupt.



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