Suresh Srinivas created HDFS-4892: ------------------------------------- Summary: Number of transceivers reported by the datanode is incorrect Key: HDFS-4892 URL: https://issues.apache.org/jira/browse/HDFS-4892 Project: Hadoop HDFS Issue Type: Bug Affects Versions: 2.0.0-alpha Reporter: Suresh Srinivas
Currently a datanode reports the transceiver count to namenode. Namenode aggregates this as TotalLoad metrics and is used for monitoring cluster activity. It is also used for making block placement decision, to qualify if a datanode is a good target. Currently transceiver count is = 1 (for XceiverServer) + 1 * (number of readers) + 2 * (Number of writers in pipeline) + 1 * (number of datanode replications) + 1 * (number of recover blocks) Should the number of transceiver just reflect number of readers + writers, instead of reporting it as is currently done. Separately we should perhaps report readers and writers as separate count. This -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira