Harsh J created HDFS-3645: ----------------------------- Summary: Improve the way we do detection of a busy DN in the cluster, when choosing it for a block write Key: HDFS-3645 URL: https://issues.apache.org/jira/browse/HDFS-3645 Project: Hadoop HDFS Issue Type: Improvement Components: name-node Affects Versions: 2.0.0-alpha Reporter: Harsh J Priority: Minor
Right now, I think we do too naive a computation for detecting if a chosen DN target is busy by itself. We currently do {{node.getXceiverCount() > (2.0 * avgLoad)}}. We should improve on this computation with a more realistic measure of if a DN is really busy by itself or not (rather than checking against cluster average, where there's a good chance the value can be wrong to compare with, for some cases) -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira