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https://issues.apache.org/jira/browse/HDFS-11038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaobing Zhou reopened HDFS-11038:
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Reopened this ticket since HDFS-9462 will be deprecated in that some of work
overlaps with Query command, however, the work supporting running multiple
commands sequentially in one setup is quite useful, and will be tracked here.
> DiskBalancer: support running multiple commands under one setup of disk
> balancer
> --------------------------------------------------------------------------------
>
> Key: HDFS-11038
> URL: https://issues.apache.org/jira/browse/HDFS-11038
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: balancer & mover
> Reporter: Xiaobing Zhou
> Assignee: Xiaobing Zhou
>
> Disk balancer follows/reuses one rule designed by HDFS balancer, that is,
> only one instance is allowed to run at the same time. This is correct in
> production system to avoid any inconsistencies, but it's not ideal to write
> and run unit tests. For example, it should be allowed run plan, execute, scan
> commands under one setup of disk balancer. One instance rule will throw
> exception by complaining 'Another instance is running'. In such a case,
> there's no way to do a full life cycle tests which involves a sequence of
> commands.
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