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https://issues.apache.org/jira/browse/HDDS-5757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jackson Yao updated HDDS-5757:
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Description:
when i test container balancer in k8s cluster, i use the command line :
./ozone admin containerbalancer start -i -1 -t 0.000001 -d 1 -s 500, and set
the contaienr size to 1G.
i found that balancer thread can not stop when the cluster is close to balance.
suppose we have three datanodes d1,d2,d3(disk usage are 67G, 67G, 68G), and the
fourth d4 datanode's disk usage is 1G. when i start balancer, it begin to
balance and work well, many containers have been moved from d1,d2,d3 to d4. but
when the cluster is close to balance(the disk usages of the four datanodes are
50G,51G,50G,51G), the balancer is still running , it will move container among
those datanodes again and again.
so we should let the balancer thread exit when the cluster can not be more
balancer
was:
when i test container balancer in k8s cluster, i use the command line :
./ozone admin containerbalancer start -i -1 -t 0.000001 -d 1 -s 500, and set
the contaienr size to 1G.
i found that balancer thread can not stop when the cluster is close to balance.
suppose we have three datanodes d1,d2,d3(disk usage are 67G, 67G, 68G), and the
fourth d4 datanode's disk usage is 1G. when i start balancer, it begin to
balance and work well, many containers have been moved from d1,d2,d3 to d4. but
when the cluster is close to balance(the disk usages of the four datanodes are
50G,51G,50G,51G), the balancer is still running , it will move container among
those datanodes again and again.
so we should let the balancer thread exit when the cluster can not be more
balancer
> balancer can not stop at the right time
> ---------------------------------------
>
> Key: HDDS-5757
> URL: https://issues.apache.org/jira/browse/HDDS-5757
> Project: Apache Ozone
> Issue Type: Sub-task
> Reporter: Jackson Yao
> Assignee: Jackson Yao
> Priority: Major
>
> when i test container balancer in k8s cluster, i use the command line :
> ./ozone admin containerbalancer start -i -1 -t 0.000001 -d 1 -s 500, and set
> the contaienr size to 1G.
> i found that balancer thread can not stop when the cluster is close to
> balance.
> suppose we have three datanodes d1,d2,d3(disk usage are 67G, 67G, 68G), and
> the fourth d4 datanode's disk usage is 1G. when i start balancer, it begin to
> balance and work well, many containers have been moved from d1,d2,d3 to d4.
> but when the cluster is close to balance(the disk usages of the four
> datanodes are 50G,51G,50G,51G), the balancer is still running , it will move
> container among those datanodes again and again.
> so we should let the balancer thread exit when the cluster can not be more
> balancer
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