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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7912) Erasure Coding: track BlockInfo instead of Block in UnderReplicatedBlocks and PendingReplicationBlocks
Date Wed, 11 Mar 2015 00:12:38 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14356001#comment-14356001
] 

Zhe Zhang commented on HDFS-7912:
---------------------------------

I've just posted a patch for HDFS-7369. Looking forward to your feedback!

> Erasure Coding: track BlockInfo instead of Block in UnderReplicatedBlocks and PendingReplicationBlocks
> ------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-7912
>                 URL: https://issues.apache.org/jira/browse/HDFS-7912
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>         Attachments: HDFS-7912.000.patch
>
>
> Now with striped blocks and the design that uses a single BlockInfoStriped object to
track all the corresponding blocks, we need to clearly distinguish the type Block and BlockInfo
in BlockManager. Specifically, data structures like {{UnderReplicatedBlocks}} and {{PendingReplicationBlocks}}
should track BlockInfo instead of Block in order to support striped block recovery.



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