Most of the jobs are running slow after I added a datanode which previously had some hardware issues, now corrected. But everytime ( 2 times i added) i add it the cluster, the jobs are running slow. I checked I/O rate with another server and it looks good too.. Please advise.
Have you confirmed if there are containers being run on this node(and non local reads) thats causing job to be slow? If thats the case I would recommend to install only 'datanode' process first and once cluster is balanced (maybe after day) add 'nodemanager' process to run containers on the node.
Yes, i have node manager running as well. And yes, seems like containers are taking longer time. Can you tell me in what way it will help when i balance my cluster and then add nodemanager to it?