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From "Uma Maheswara Rao G (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-10800) [SPS]: Daemon thread in Namenode to find blocks placed in other storage than what the policy specifies
Date Fri, 23 Sep 2016 20:43:20 GMT

     [ https://issues.apache.org/jira/browse/HDFS-10800?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Uma Maheswara Rao G updated HDFS-10800:
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: HDFS-10285
           Status: Resolved  (was: Patch Available)

I have just committed this to branch

> [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
>             Fix For: HDFS-10285
>         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,
> 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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