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From "Anu Engineer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9735) DiskBalancer : Refactor moveBlockAcrossStorage to be used by disk balancer
Date Wed, 06 Apr 2016 21:55:25 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9735?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15229213#comment-15229213
] 

Anu Engineer commented on HDFS-9735:
------------------------------------

That is a good question. This is how the current {{FsDatasetSpi#moveBlockAcrossStorage}} works.
Since we don't have any bug reports pending against this code , and the fact that a very similar
issue was explored in HDFS-9661 make me think that this code is stable. There is a potential
that diskbalancer might expose this scenario more than the mover. Are you suggesting that
 I expand the scope of Synchronized ? 

[~brahmareddy], [~vinayrpet] & [~arpitagarwal]  would guys please care to comment on the
question from [~eddyxu]. Thanks in advance.

> DiskBalancer : Refactor moveBlockAcrossStorage to be used by disk balancer
> --------------------------------------------------------------------------
>
>                 Key: HDFS-9735
>                 URL: https://issues.apache.org/jira/browse/HDFS-9735
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: balancer & mover
>    Affects Versions: HDFS-1312
>            Reporter: Anu Engineer
>            Assignee: Anu Engineer
>             Fix For: HDFS-1312
>
>         Attachments: HDFS-9735-HDFS-1312.001.patch, HDFS-9735-HDFS-1312.002.patch
>
>
> Refactor moveBlockAcrossStorage so that code can be shared by both mover and diskbalancer.



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