Hi, bikash I also worked on this several months ago,
If I don't have a wrong memory, the involved files should be: JobTracker.java, TaskTracker.java, the most interesting functions should be JobTracker.heartbeat(), and TaskTracker.transmitHeartbeat(), I think you will also need to add more member variables in TaskTrackerStatus.java take care about the write() and read() in TaskTrackerStatus.java, Best, Nan On Sat, Mar 19, 2011 at 1:59 AM, bikash sharma <sharmabiks...@gmail.com>wrote: > Hi, > For my research project, I need to modify Hadoop JobTracker to collect some > statistics of TaskTracker nodes. > For example, I would like to piggy-back heartbeat messages sent from > TaskTrackers to JobTracker with some extra information related to the > resource utilization and other statistics. > I am able to checkout Hadoop common code base and build in Eclipse. > Specifically, which files should I look at, and after the above mentioned > modification, how to collect the statistics? > > Thanks, > Bikash > -- Nan Zhu School of Software,5501 Shanghai Jiao Tong University 800,Dongchuan Road,Shanghai,China E-Mail: zhunans...@gmail.com
