farmmamba created HDFS-17171:
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Summary: CONGESTION_RATIO should be configurable
Key: HDFS-17171
URL: https://issues.apache.org/jira/browse/HDFS-17171
Project: Hadoop HDFS
Issue Type: Improvement
Components: datanode
Affects Versions: 3.4.0
Reporter: farmmamba
Currently, The valuee of DataNode#CONGESTION_RATIO is 1.5 and it is not
configurable.
When the average load of a datanode in last one minute is higer than
CONGESTION_RATIO * NUM_CORES, this datanode will be regard as CONGESTED.
In most real production envs, the default value 1.5 seems not appropriate. So
,we should change this value to be configurable.
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