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Posted to issues@hbase.apache.org by "Gavin (JIRA)" <ji...@apache.org> on 2018/08/01 06:22:14 UTC
[jira] [Issue Comment Deleted] (HBASE-18946) Stochastic load
balancer assigns replica regions to the same RS
[ https://issues.apache.org/jira/browse/HBASE-18946?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gavin updated HBASE-18946:
--------------------------
Comment: was deleted
(was: A comment with security level 'jira-users' was removed.)
> Stochastic load balancer assigns replica regions to the same RS
> ---------------------------------------------------------------
>
> Key: HBASE-18946
> URL: https://issues.apache.org/jira/browse/HBASE-18946
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.0.0-alpha-3
> Reporter: ramkrishna.s.vasudevan
> Assignee: stack
> Priority: Major
> Fix For: 2.0.0-beta-1, 2.0.0
>
> Attachments: HBASE-18946.master.001.patch, HBASE-18946.master.002.patch, HBASE-18946.master.003.patch, HBASE-18946.master.004.patch, HBASE-18946.master.005.patch, HBASE-18946.master.006.patch, HBASE-18946.master.007.patch, HBASE-18946.master.008.patch, HBASE-18946.master.009.patch, HBASE-18946.master.010.patch, HBASE-18946.master.011.patch, HBASE-18946.master.012.patch, HBASE-18946.patch, HBASE-18946.patch, HBASE-18946_2.patch, HBASE-18946_2.patch, HBASE-18946_simple_7.patch, HBASE-18946_simple_8.patch, TestRegionReplicasWithRestartScenarios.java
>
>
> Trying out region replica and its assignment I can see that some times the default LB Stocahstic load balancer assigns replica regions to the same RS. This happens when we have 3 RS checked in and we have a table with 3 replicas. When a RS goes down then the replicas being assigned to same RS is acceptable but the case when we have enough RS to assign this behaviour is undesirable and does not solve the purpose of replicas.
> [~huaxiang] and [~enis].
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