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From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-10800) [SPS]: Daemon thread in Namenode to find the blocks placed in other storage than what the policy is expecting
Date Thu, 22 Sep 2016 02:30:20 GMT

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

Kai Zheng updated HDFS-10800:
-----------------------------
    Summary: [SPS]: Daemon thread in Namenode to find the blocks placed in other storage than
what the policy is expecting  (was: [SPS]: Storage Policy Satisfier daemon thread in Namenode
to find the blocks which were placed in other storages than what NN is expecting.)

> [SPS]: Daemon thread in Namenode to find the blocks placed in other storage than what
the policy is expecting
> -------------------------------------------------------------------------------------------------------------
>
>                 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
>
>
> This JIRA is for implementing a daemon thread called StoragePolicySatisfier in nematode,
which should scan the asked files blocks which were placed in wrong storages in DNs. 
>  The idea is:
>       # When user called on some files/dirs for satisfyStorage policy, They should have
tracked in NN and then StoragePolicyDaemon thread will pick one by one file and then check
the blocks which might have placed in wrong storage in DN than what NN is expecting it to.
>       # After checking all, it should also construct the data structures for the required
information to move a block from one storage to another.



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