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https://issues.apache.org/jira/browse/HDFS-7116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14707928#comment-14707928
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Tsz Wo Nicholas Sze commented on HDFS-7116:
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> Expose metric named "BalancerBandwidth" in the Datanode metrics to get the
> bandwidth of balancer.
By "bandwidth of balancer", I guess you mean
dfs.datanode.balance.bandwidthPerSec, which can be changed in runtime by the
"dfsadmin –setBalancerBandwidth" command. This seems wrong to show it in
metric since it is a mostly constant value. Just like that we won't show other
conf values in metric.
How about adding a new dfsadmin command?
> Add a metric to expose the bandwidth of balancer
> ------------------------------------------------
>
> Key: HDFS-7116
> URL: https://issues.apache.org/jira/browse/HDFS-7116
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: balancer & mover
> Reporter: Akira AJISAKA
> Assignee: Rakesh R
> Attachments: HDFS-7116-00.patch, HDFS-7116-01.patch,
> HDFS-7116-02.patch, HDFS-7116-03.patch, HDFS-7116-04.patch, HDFS-7116-05.patch
>
>
> Now reading logs is the only way to check how the balancer bandwidth is set.
> It would be useful for administrators if they can get the value of the same.
> This jira to discuss & implement the way to access the balancer bandwidth
> value of the datanode.
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