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https://issues.apache.org/jira/browse/HDFS-6685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo Nicholas Sze updated HDFS-6685:
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Attachment: h6685_20140730.patch
Thanks Arpit for reviewing the patch.
h6685_20140730.patch:
- updates the comment at Balancer.java:357;
- fixes a bug that in utilization classification and simplifies the calculation;
- fixes a bug that getRemaining should get from a storage group but not a
datanode; and
- syncs the patch with trunk.
The patch here indeed is not specific to the HDFS-6584 branch. Let's target it
to trunk.
> Archival Storage: Update Balancer to preserve storage type of replicas
> ----------------------------------------------------------------------
>
> Key: HDFS-6685
> URL: https://issues.apache.org/jira/browse/HDFS-6685
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: balancer
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Tsz Wo Nicholas Sze
> Attachments: h6685_20140728.patch, h6685_20140729.patch,
> h6685_20140730.patch
>
>
> In order to maintain storage policy requirement, Balancer always moves
> replicas from a storage with any type to another storage with the same type,
> i.e. it preserves storage type of replicas. In this way, Balancer does not
> require to know storage policy information.
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