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https://issues.apache.org/jira/browse/HDFS-12859?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jianfei Jiang updated HDFS-12859:
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Release Note: Add command "hdfs dfsadmin -resetBalancerBandwidth" (was:
Add a command "hdfs dfsadmin -resetBalancerBandwidth" to reset balancer
bandwidth with configuration file.)
Status: Patch Available (was: Open)
Add command "hdfs dfsadmin -resetBalancerBandwidth" to reset balancer bandwidth
with configuration file.
Also give a new test case.
> Admin command resetBalancerBandwidth
> ------------------------------------
>
> Key: HDFS-12859
> URL: https://issues.apache.org/jira/browse/HDFS-12859
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: balancer & mover
> Affects Versions: 3.0.0-beta1
> Reporter: Jianfei Jiang
> Fix For: 3.1.0
>
> Attachments: HDFS-12859.patch
>
>
> We can already set balancer bandwidth dynamically using command
> setBalancerBandwidth. The setting value is not persistent and not stored in
> configuration file. The different datanodes could their different default or
> former setting in configuration.
> When we suggested to develop a schedule balancer task which runs at midnight
> everyday. We set a larger bandwidth for it and hope to reset the value after
> finishing. However, we found it difficult to reset the different setting for
> different datanodes as the setBalancerBandwidth command can only set the same
> value to all datanodes. If we want to use unique setting for every datanode,
> we have to reset the datanodes.
> So it would be useful to have a command to synchronize the setting with the
> configuration file.
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