[jira] [Commented] (HBASE-16169) Make RegionSizeCalculator scalable

["Thiruvel Thirumoolan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-16169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15646153#comment-15646153 ] 

Thiruvel Thirumoolan commented on HBASE-16169:
----------------------------------------------

[~tedyu], Thanks for the review. I responded back to your comments. Are there any other comments before I work on them? Thanks!

> 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
>
>
> 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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