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From "Li Bo (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9040) Erasure coding: A BlockGroupDataStreamer to rule all internal blocks streamers
Date Thu, 10 Sep 2015 03:16:46 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14738076#comment-14738076
] 

Li Bo commented on HDFS-9040:
-----------------------------

Implementing a block group writer is a better solution but you have to copy a lot of existing
code to the new class, which may be hard to be accepted by community. At beginning I also
tried this way but gave up after discussion. Current design and implementation give as few
changes as possible  to the existing code. 

> Erasure coding: A BlockGroupDataStreamer to rule all internal blocks streamers
> ------------------------------------------------------------------------------
>
>                 Key: HDFS-9040
>                 URL: https://issues.apache.org/jira/browse/HDFS-9040
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Walter Su
>            Assignee: Walter Su
>
> A {{BlockGroupDataStreamer}} to communicate with NN to allocate/update block, and {{StripedDataStreamer}}
s only have to stream blocks to DNs. 



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