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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5157) Datanode should allow choosing the target storage
Date Mon, 09 Sep 2013 07:46:55 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13761682#comment-13761682
] 

Junping Du commented on HDFS-5157:
----------------------------------

BTW, can we address volume policy first (as no dependency) and address datatransfer protocol
changes later (depend on HDFS-4990)? [~szetszwo], are you comfortable with this?
                
> Datanode should allow choosing the target storage
> -------------------------------------------------
>
>                 Key: HDFS-5157
>                 URL: https://issues.apache.org/jira/browse/HDFS-5157
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>    Affects Versions: Heterogeneous Storage (HDFS-2832)
>            Reporter: Arpit Agarwal
>            Assignee: Junping Du
>
> Datanode should allow should choosing a target Storage or target Storage Type as a parameter
when creating a new block. Currently there are two ways in which the target volume is chosen
(via {{VolumeChoosingPolicy#chooseVolume}}.
> # AvailableSpaceVolumeChoosingPolicy
> # RoundRobinVolumeChoosingPolicy
> BlockReceiver and receiveBlock should also accept a new parameter for target storage
or storage type.

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