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From "Jinglun (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-14591) NameNode should move the replicas to the correct storages after the storage policy is changed.
Date Fri, 21 Jun 2019 10:36:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-14591?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jinglun resolved HDFS-14591.
----------------------------
    Resolution: Fixed

redundant with HDFS-10285, HDFS-7343

> NameNode should move the replicas to the correct storages after the storage policy is
changed.
> ----------------------------------------------------------------------------------------------
>
>                 Key: HDFS-14591
>                 URL: https://issues.apache.org/jira/browse/HDFS-14591
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Jinglun
>            Assignee: Jinglun
>            Priority: Major
>
> Our Xiaomi HDFS has a cluster storaging both HOT and COLD data. We have a backgroud process
searching all the files to find those that are not accessed for a period of time. Then we
set them to COLD and start a mover to move the replicas. After moving, all the replicas are
consistent with the storage policy.
> It's a natural idea to let the NameNode handle the move.



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