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Posted to issues@hbase.apache.org by "Xiang Li (JIRA)" <ji...@apache.org> on 2018/03/06 10:25:00 UTC

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

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

Xiang Li updated HBASE-20133:
-----------------------------
    Summary: Calculate correct assignment and build region movement plans for mis-placed regions in one pass  (was: Calculate corrected assignment and build region movement plans for mis-placed regions in one pass)

> Calculate correct 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 mis-paced regions out and calls findServerForRegion() several times 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. As a result, findServerForRegion() could be removed if I get it correctly.



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