On Sep 2, 2008, at 9:00 PM, Ryan LeCompte wrote:
Beginner's question: If I have a cluster with a single node that has a max of 1 map/1 reduce, and the job submitted has 50 maps... Then it will process only 1 map at a time. Does that mean that it's spawning 1 new JVM for each map processed? Or re-using the same JVM when a new map can be processed?
It creates a new JVM for each task. Devaraj is working on https://issues.apache.org/jira/browse/HADOOP-249 which will allow the jvms to run multiple tasks sequentially. -- Owen
