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https://issues.apache.org/jira/browse/HDFS-5009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13753489#comment-13753489
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Tsz Wo (Nicholas), SZE commented on HDFS-5009:
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Junping, it is great that you could review the patch. I started working on it.
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BTW, I think LocatedBlock should has a DatanodeStorage[] field, where
DatanodeStorage contains storageID, state and storageType. If we put
DatanodeStorage in LocatedBlock, we have to move it from the
hdfs.server.protocol package to the hdfs.protocol package since LocatedBlock is
in hdfs.protocol. Sounds good?
> NameNode should expose storage information in the LocatedBlock
> --------------------------------------------------------------
>
> Key: HDFS-5009
> URL: https://issues.apache.org/jira/browse/HDFS-5009
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Affects Versions: 3.0.0
> Reporter: Arpit Agarwal
> Assignee: Tsz Wo (Nicholas), SZE
>
> The storage type is optionally reported by the DataNode along with block
> report. The NameNode should make this information available to clients via
> LocatedBlock.
> Also, LocatedBlock is used in reportBadBlocks(..). We should add storage ID
> to LocatedBlock.
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