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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-7678) Erasure coding: DFSInputStream with decode functionality (pread)
Date Tue, 12 May 2015 04:17:01 GMT

     [ 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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