Jianfei Jiang created HDFS-12859:
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Summary: 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
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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