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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7678) Erasure coding: DFSInputStream with decode functionality
Date Mon, 20 Apr 2015 22:36:59 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7678?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14503842#comment-14503842
] 

Zhe Zhang commented on HDFS-7678:
---------------------------------

Thanks Kai, I will review HADOOP-11847 first. 

> Erasure coding: DFSInputStream with decode functionality
> --------------------------------------------------------
>
>                 Key: HDFS-7678
>                 URL: https://issues.apache.org/jira/browse/HDFS-7678
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Li Bo
>            Assignee: Zhe Zhang
>         Attachments: BlockGroupReader.patch, HDFS-7678.000.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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