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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15515) Improve LocalityBasedCandidateGenerator in Balancer
Date Fri, 25 Mar 2016 01:25:25 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15211248#comment-15211248
] 

Hudson commented on HBASE-15515:
--------------------------------

FAILURE: Integrated in HBase-Trunk_matrix #805 (See [https://builds.apache.org/job/HBase-Trunk_matrix/805/])
HBASE-15515 Improve LocalityBasedCandidateGenerator in Balancer (tedyu: rev ad3feaa44800f10d102255a240c38ccf23a82d49)
* hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionLocationFinder.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.java


> 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, 1.3.0, 1.4.0
>
>         Attachments: HBASE-15515-v1.patch, HBASE-15515.patch
>
>
> 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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