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https://issues.apache.org/jira/browse/HDFS-17037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17729066#comment-17729066
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ASF GitHub Bot commented on HDFS-17037:
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zhangshuyan0 opened a new pull request, #5715:
URL: https://github.com/apache/hadoop/pull/5715
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### Description of PR
When we run balancer with `BalancingPolicy.Node` policy, our goal is to make
each datanode storage balanced. But in the current implementation, the balancer
doesn't account for storage used by non-dfs on the datanodes, which can make
the situation worse for datanodes that are already strained on storage.
### How was this patch tested?
Add a new UT.
> Consider nonDfsUsed when running balancer
> -----------------------------------------
>
> Key: HDFS-17037
> URL: https://issues.apache.org/jira/browse/HDFS-17037
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Shuyan Zhang
> Assignee: Shuyan Zhang
> Priority: Major
>
> When we run balancer with `BalancingPolicy.Node` policy, our goal is to make
> each datanode storage balanced. But in the current implementation, the
> balancer doesn't account for storage used by non-dfs on the datanodes, which
> can make the situation worse for datanodes that are already strained on
> storage.
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