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Posted to hdfs-issues@hadoop.apache.org by "Zhe Zhang (JIRA)" <ji...@apache.org> on 2015/04/17 19:03:58 UTC

[jira] [Commented] (HDFS-8171) Extend BlockSender to support multiple block data source

    [ https://issues.apache.org/jira/browse/HDFS-8171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14500195#comment-14500195 ] 

Zhe Zhang commented on HDFS-8171:
---------------------------------

Looks like we can do this as a follow-on? If multiple blocks fail (a rare case), how about we just send them to destinations 1 by 1 at this stage?

> Extend BlockSender to support multiple block data source
> --------------------------------------------------------
>
>                 Key: HDFS-8171
>                 URL: https://issues.apache.org/jira/browse/HDFS-8171
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>            Reporter: Li Bo
>            Assignee: Li Bo
>
> Currently BlockSender reads a block from the disk and sends it to a remote datanode. In EC encode/decode work, new blocks are generated by calculation. In order to store these blocks to remote datanodes, we can ask BlockSender to read data from the output of encode/decode calculation.



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