[ https://issues.apache.org/jira/browse/HADOOP-2830?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Allen Wittenauer resolved HADOOP-2830. -------------------------------------- Resolution: Duplicate I'm pushing this into 289 too. > Need to instrument Hadoop to get comprehensive network traffic metrics > ---------------------------------------------------------------------- > > Key: HADOOP-2830 > URL: https://issues.apache.org/jira/browse/HADOOP-2830 > Project: Hadoop Common > Issue Type: Improvement > Reporter: Runping Qi > > One of most often asked question regarding Hadoop performance is: was the job > cpu bounded, or disk bounded, or network bounded. > The first two parts can be answered based on metric data of individual > machines, thus are relatively easy to answer. > The third part is much harder, especially for a large cluster. To unswer the > question, we need to know the followings: > 1. The network traffic to and from the nodes in the cluster > 2. The network traffic going between node pairs through the switch they share > 3. The network traffic going through the back links between the switches > With these data, we can get a better insight on the relationship between > network bandwidth and hadoop performance. > We need to instrument the Hadoop code to obtain the above data. -- This message was sent by Atlassian JIRA (v6.2#6252)