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https://issues.apache.org/jira/browse/HDFS-1359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12905997#action_12905997
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Tsz Wo (Nicholas), SZE commented on HDFS-1359:
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+1 the new patch looks good

> This is what I want to do. However, ReplicaRecoveryInfo, which is a subclass 
> of Block and implements write()  method. ...

In this case, we probably should add a new final method Block.writeHelper(..), 
then Block.write(..), ExtendedBlock.write(..) and the other subclasses of Block 
could use it.  See if you think it is a good idea.

> HDFS federation: Add BlockPoolID to block
> -----------------------------------------
>
>                 Key: HDFS-1359
>                 URL: https://issues.apache.org/jira/browse/HDFS-1359
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>             Fix For: Federation Branch
>
>         Attachments: HDFS-1359.1.patch, HDFS-1359.patch
>
>
> This is a subtask to HDFS-1052 to add BlockPoolID to Block.

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