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Posted to dev@hbase.apache.org by "Zhuoyue Huang (Jira)" <ji...@apache.org> on 2021/06/03 10:51:00 UTC
[jira] [Resolved] (HBASE-25666) Explain why balancer is skipping
runs
[ https://issues.apache.org/jira/browse/HBASE-25666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zhuoyue Huang resolved HBASE-25666.
-----------------------------------
Resolution: Fixed
> Explain why balancer is skipping runs
> -------------------------------------
>
> Key: HBASE-25666
> URL: https://issues.apache.org/jira/browse/HBASE-25666
> Project: HBase
> Issue Type: Improvement
> Components: Balancer, master, UI
> Reporter: Clara Xiong
> Assignee: Zhuoyue Huang
> Priority: Major
> Fix For: 3.0.0-alpha-1, 2.5.0, 2.4.4
>
>
> Balancer needs to find the balance of keeping cluster balanced and stable. There is a configuration minCostNeedBalance as the threshold of imbalance to try to balance. Since we use a single score to combine all the factors we consider, it is hard for operation to understand why balancer is "stuck". We should add to master-status UI to show balancer is skipping runs and explain all factors considered, such as the weight and cost of all cost functions.
>
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