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From "GAO Rui (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7344) [umbrella] Erasure Coding worker and support in DataNode
Date Mon, 14 Dec 2015 08:04:46 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7344?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15055600#comment-15055600
] 

GAO Rui commented on HDFS-7344:
-------------------------------

Hi [~drankye], [~libo-intel], do we still use this Jira to track the implementing process
of {{ErasureCodingWorker}} ? Could you give me some advice and Jiras which could help me to
catch up with the {{ErasureCodingWorker}} implementing? 

> [umbrella] Erasure Coding worker and support in DataNode
> --------------------------------------------------------
>
>                 Key: HDFS-7344
>                 URL: https://issues.apache.org/jira/browse/HDFS-7344
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>            Reporter: Kai Zheng
>            Assignee: Li Bo
>         Attachments: ECWorker-design-v2.pdf, HDFS ECWorker Design.pdf, hdfs-ec-datanode.0108.zip,
hdfs-ec-datanode.0108.zip
>
>
> According to HDFS-7285 and the design, this handles DataNode side extension and related
support for Erasure Coding. More specifically, it implements {{ECWorker}}, which reconstructs
lost blocks (in striping layout).
> It generally needs to restore BlockGroup and schema information from coding commands
from NameNode or other entities, and construct specific coding work to execute. The required
block reader, writer, either local or remote, encoder and decoder, will be implemented separately
as sub-tasks. 
> This JIRA will track all the linked sub-tasks, and is responsible for general discussions
and integration for ECWorker. It won't resolve until all the related tasks are done.



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