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https://issues.apache.org/jira/browse/HBASE-16169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15670026#comment-15670026
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Thiruvel Thirumoolan commented on HBASE-16169:
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Thanks [~stack], the recent precommit builds are much better.

> Make RegionSizeCalculator scalable
> ----------------------------------
>
>                 Key: HBASE-16169
>                 URL: https://issues.apache.org/jira/browse/HBASE-16169
>             Project: HBase
>          Issue Type: Sub-task
>          Components: mapreduce, scaling
>            Reporter: Thiruvel Thirumoolan
>            Assignee: Thiruvel Thirumoolan
>             Fix For: 2.0.0, 1.4.0
>
>         Attachments: HBASE-16169.master.000.patch, 
> HBASE-16169.master.001.patch, HBASE-16169.master.002.patch, 
> HBASE-16169.master.003.patch, HBASE-16169.master.004.patch, 
> HBASE-16169.master.005.patch, HBASE-16169.master.006.patch, 
> HBASE-16169.master.007.patch, HBASE-16169.master.007.patch, 
> HBASE-16169.master.008.patch
>
>
> RegionSizeCalculator is needed for better split generation of MR jobs. This 
> requires RegionLoad which can be obtained via ClusterStatus, i.e. accessing 
> Master. We don't want master to be in this path.
> The proposal is to add an API to the RegionServer that gets RegionLoad of all 
> regions hosted on it or those of a table if specified. RegionSizeCalculator 
> can use the latter.



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