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From "Thiruvel Thirumoolan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-16169) Make RegionSizeCalculator scalable
Date Thu, 14 Jul 2016 20:35:20 GMT

     [ https://issues.apache.org/jira/browse/HBASE-16169?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Thiruvel Thirumoolan updated HBASE-16169:
-----------------------------------------
    Release Note: 
Added couple of API's to Admin.java:

Returns region load map of all regions hosted on a region server
Map<byte[], RegionLoad> getRegionLoad(ServerName sn) throws IOException;

Returns region load map of all regions of a table hosted on a region server
Map<byte[], RegionLoad> getRegionLoad(ServerName sn, TableName tableName) throws IOException

> 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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