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Posted to hdfs-issues@hadoop.apache.org by "Arpit Agarwal (JIRA)" <ji...@apache.org> on 2014/08/01 02:58:39 UTC

[jira] [Commented] (HDFS-6685) Balancer should preserve storage type of replicas

    [ https://issues.apache.org/jira/browse/HDFS-6685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14081762#comment-14081762 ] 

Arpit Agarwal commented on HDFS-6685:
-------------------------------------

+1 for the latest patch.

> 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, h6685_20140730b.patch, h6685_20140731.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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