Read and write metrics misleading/not helpful ---------------------------------------------
Key: HDFS-942 URL: https://issues.apache.org/jira/browse/HDFS-942 Project: Hadoop HDFS Issue Type: Bug Reporter: ryan rawson the metrics wrap the entire readBlock() writeBlock() call (in DataXciever#run()) The problem with this is it includes the client socket read/write time. This means if a client is slow at streaming a write block (eg: in hbase) then it skews the write metrics and makes it look like the server is really slow. Same problem with reads. It would be nice if reads/writes meant actually local disk io and related processing (eg: checksum verification/generation) -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.