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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6685) Balancer should preserve storage type of replicas
Date Thu, 31 Jul 2014 07:26:39 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14080603#comment-14080603

Arpit Agarwal commented on HDFS-6685:

Hi Nicholas, could you please rebase to trunk now that HDFS-6441 is checked in. The merge
could be unpleasant.

> Balancer should preserve storage type of replicas
> -------------------------------------------------
>                 Key: HDFS-6685
>                 URL: https://issues.apache.org/jira/browse/HDFS-6685
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: balancer
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Tsz Wo Nicholas Sze
>         Attachments: h6685_20140728.patch, h6685_20140729.patch, h6685_20140730.patch,
> When Balancer moves replicas to balance the cluster, it should always move replicas from
a storage with any type to another storage with the same type, i.e. it preserves storage type
of replicas.  It does not make sense to move replicas to a different storage type.

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