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Anu Engineer commented on HDFS-11564: ------------------------------------- The algorithms of choosing 2 random nodes and then placing the container on the lower utilization node is discussed in great depth in this survey paper. https://pdfs.semanticscholar.org/3597/66cb47572028eb70c797115e987ff203e83f.pdf > 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 > > 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. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org