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https://issues.apache.org/jira/browse/HDFS-11564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15954006#comment-15954006
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Xiaoyu Yao commented on HDFS-11564:
-----------------------------------
Thanks [~anu] for the update. +1 for the latest patch.The minor checkstyle
issue can be fixed at commit time.
{code}
./hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/container/placement/TestDatanodeMetrics.java:27:import
static org.junit.Assert.assertFalse;:15: Unused import -
org.junit.Assert.assertFalse. [UnusedImports]
{code}
> 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
> Assignee: Anu Engineer
> Attachments: HDFS-11564-HDFS-7240.001.patch,
> HDFS-11564-HDFS-7240.002.patch, HDFS-11564-HDFS-7240.003.patch,
> HDFS-11564-HDFS-7240.004.patch
>
>
> 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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