Anu Engineer created HDFS-11564:
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Summary: Ozone: SCM: Add Comparable Metric Support
Key: HDFS-11564
URL: https://issues.apache.org/jira/browse/HDFS-11564
Project: Hadoop HDFS
Issue Type: Sub-task
Components: ozone
Affects Versions: HDFS-7240
Reporter: Anu Engineer
While picking the datanode or the pool to place a container, SCM needs to be
able to compare pools and datanodes. This jira proposes to add a Comparable
Metric interface from which DatanodeCapacity and DatanodeIOLoad metrics can be
derived. This will also convert SCM Container Placement Capacity policy to use
these metrics.
Adding these metrics makes all placement policy operate on the basis of these
metrics and it makes it easy to simulate cluster imbalances as well as reason
about code. All new SCM metrics which have the property of total ordering
should be derived from this interface.
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