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https://issues.apache.org/jira/browse/HDFS-4989?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Junping Du updated HDFS-4989:
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Description:
Balancer needs to balance with in a storage tier. A couple of works:
- add an option of storageType in balancer CLI to balance data on a specific
storage type.
- add storageType to BalancingPolicy
- need new API (getDatanodeReport(StorageType) peer with getDatanodeReport()
before) in ClientProtocol to get storage related info from NN so that balancer
can choose storages as <source, target> balancing pair.
- update chooseDatanodes() algorithm to choose storages on the same DN first in
setting up <under-utilization, over-load> pairs.
was:Balancer needs to balance with in a storage tier. Also needs an option to
balance only a specific storage type.
> Balancer needs to consider storage type in balancing
> ----------------------------------------------------
>
> Key: HDFS-4989
> URL: https://issues.apache.org/jira/browse/HDFS-4989
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: balancer, datanode, namenode
> Reporter: Suresh Srinivas
> Assignee: Junping Du
>
> Balancer needs to balance with in a storage tier. A couple of works:
> - add an option of storageType in balancer CLI to balance data on a specific
> storage type.
> - add storageType to BalancingPolicy
> - need new API (getDatanodeReport(StorageType) peer with getDatanodeReport()
> before) in ClientProtocol to get storage related info from NN so that
> balancer can choose storages as <source, target> balancing pair.
> - update chooseDatanodes() algorithm to choose storages on the same DN first
> in setting up <under-utilization, over-load> pairs.
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