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From "Guanghao Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-15515) Improve LocalityBasedCandidateGenerator in Balancer
Date Tue, 22 Mar 2016 03:06:25 GMT
Guanghao Zhang created HBASE-15515:

             Summary: Improve LocalityBasedCandidateGenerator in Balancer
                 Key: HBASE-15515
                 URL: https://issues.apache.org/jira/browse/HBASE-15515
             Project: HBase
          Issue Type: Bug
    Affects Versions: 2.0.0, 1.3.0
            Reporter: Guanghao Zhang
            Assignee: Guanghao Zhang
            Priority: Minor
             Fix For: 2.0.0

There are some problems which need to fix.
1. LocalityBasedCandidateGenerator.getLowestLocalityRegionOnServer should skip empty region.
2. When use LocalityBasedCandidateGenerator to generate Cluster.Action, it should add random
operation instead of pickLowestLocalityServer(cluster). Because the search function may stuck
here if it always generate the same Cluster.Action.
3. getLeastLoadedTopServerForRegion should get least loaded server which have better locality
than current server.

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