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https://issues.apache.org/jira/browse/HDFS-10800?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15517508#comment-15517508
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Uma Maheswara Rao G commented on HDFS-10800:
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Thanks Rakesh for the reviews. I am going ahead to commit this patch to branch.
Failures are unrelated to this change.
> [SPS]: Daemon thread in Namenode to find blocks placed in other storage than
> what the policy specifies
> ------------------------------------------------------------------------------------------------------
>
> Key: HDFS-10800
> URL: https://issues.apache.org/jira/browse/HDFS-10800
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Affects Versions: HDFS-10285
> Reporter: Uma Maheswara Rao G
> Assignee: Uma Maheswara Rao G
> Attachments: HDFS-10800-HDFS-10285-00.patch,
> HDFS-10800-HDFS-10285-01.patch, HDFS-10800-HDFS-10285-02.patch,
> HDFS-10800-HDFS-10285-03.patch, HDFS-10800-HDFS-10285-04.patch,
> HDFS-10800-HDFS-10285-05.patch
>
>
> This JIRA is for implementing a daemon thread called StoragePolicySatisfier
> in namatode, which scans the asked files blocks which are placed in different
> storages in DNs than the related policies specifie.
> The idea is:
> # When user called on some files/dirs to satisfy storage policy, they
> should have been tracked in NN and then StoragePolicySatisfier thread will
> pick one by one file, then check the blocks which might have been placed in
> different storage in DN than what the storage policy is expecting it to.
> # After checking all, it should also construct the data structures with
> the required information to move a block from one storage to another.
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