On Fri, May 8, 2009 at 1:20 AM, Raghu Angadi <[email protected]> wrote: > > > Philip Zeyliger wrote: >> >> It's over TCP/IP, in a custom protocol. See DataXceiver.java. My sense >> is >> that it's a custom protocol because Hadoop's IPC mechanism isn't optimized >> for large messages. > > yes, and job classes are not distributed using this. It is a very simple > protocol used to read and write raw data to DataNodes.
How are the job class files or jar files distributed then?
