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From "Kai Zheng (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 Thu, 22 Sep 2016 02:31:20 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 blocks placed in other storage than
what the policy specifies  (was: [SPS]: Daemon thread in Namenode to find the blocks placed
in other storage than what the policy is expecting)

> [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
>
>
> 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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