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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:
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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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