[jira] [Updated] (HBASE-20133) Calculate corrected assignment and build region movement plans for mis-placed regions in one pass

["Xiang Li (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-20133?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiang Li updated HBASE-20133:
-----------------------------
    Description: 
In RSGroupBasedLoadBalancer#balanceCluster(clusterState), the logic could be improved:
correctAssignment() builds a map for mis-placed and placed regions. 
For mis-placed regions, the key(ServerName) is BOGUS_SERVER_NAME. Then the logic gets those regions and calls findServerForRegion() to find out the current host server, in order to build RegionPlan for movement.
Some logic in correctAssignment() and findServerForRegion() could be merged so as to build both corrected assignment and RegionPlan for mis-placed region in one pass.

> Calculate corrected assignment and build region movement plans for mis-placed regions in one pass
> -------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-20133
>                 URL: https://issues.apache.org/jira/browse/HBASE-20133
>             Project: HBase
>          Issue Type: Improvement
>          Components: rsgroup
>            Reporter: Xiang Li
>            Assignee: Xiang Li
>            Priority: Critical
>
> In RSGroupBasedLoadBalancer#balanceCluster(clusterState), the logic could be improved:
> correctAssignment() builds a map for mis-placed and placed regions. 
> For mis-placed regions, the key(ServerName) is BOGUS_SERVER_NAME. Then the logic gets those regions and calls findServerForRegion() to find out the current host server, in order to build RegionPlan for movement.
> Some logic in correctAssignment() and findServerForRegion() could be merged so as to build both corrected assignment and RegionPlan for mis-placed region in one pass.



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