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From "Rakesh R (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10794) [SPS]: Provide storage policy satisfy worker at DN for co-ordinating the block storage movement work
Date Tue, 06 Sep 2016 05:56:20 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15466521#comment-15466521
] 

Rakesh R commented on HDFS-10794:
---------------------------------

Thanks a lot [~drankye] for the reviews. I'll take care 1,2,3 comments.

bq. Such codes are better to be equipped with some comments like: "TODO: it doesn't need here
and will be cleaned, when NN is implemented to be able to send block moving commands."
How about considering this as a unit test case verifying the DN side {{StorageStaisfyWorker}}
behavior alone and not required to add a specific TODO. Later, we could add NN-DN integrated
test case during {{storage movement commands}} implementation time. Does this make sense to
you?

> [SPS]: Provide storage policy satisfy worker at DN for co-ordinating the block storage
movement work
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-10794
>                 URL: https://issues.apache.org/jira/browse/HDFS-10794
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, namenode
>    Affects Versions: HDFS-10285
>            Reporter: Rakesh R
>            Assignee: Rakesh R
>         Attachments: HDFS-10794-00.patch, HDFS-10794-HDFS-10285.00.patch, HDFS-10794-HDFS-10285.01.patch,
HDFS-10794-HDFS-10285.02.patch
>
>
> The idea of this jira is to implement a mechanism to move the blocks to the given target
in order to satisfy the block storage policy. Datanode receives {{blocktomove}} details via
heart beat response from NN. More specifically, its a datanode side extension to handle the
block storage movement commands.



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