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https://issues.apache.org/jira/browse/HDFS-7912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14355423#comment-14355423
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Jing Zhao commented on HDFS-7912:
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Thanks for the comments, Zhe! Yeah, the main motivation here is to simplify the
recovery logic. In general I think to track the whole BlockInfoStriped for
recovery may be easier than to track individual data/parity blocks inside,
because in this way we can wrap the internal recovery and priority logic
inside of striped block. But I have not checked the HDFS-7369 patch yet. I will
read the patch later today.
> 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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