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Date: Thu, 31 Jul 2014 11:14:39 +0000 (UTC)
From: "Tsz Wo Nicholas Sze (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12727411.1405448124197.85497.1406805279170@arcas>
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Subject: [jira] [Updated] (HDFS-6685) Balancer should preserve storage type
 of replicas
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     [ https://issues.apache.org/jira/browse/HDFS-6685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tsz Wo Nicholas Sze updated HDFS-6685:
--------------------------------------

    Attachment: h6685_20140731.patch

h6685_20140731.patch: synced with trunk.

> 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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