Hi, When trying to compare Hadoop against other parallel paradigms, it is important to consider heterogeneous systems. Some may have 100 nodes, each single core. Some may have 100 nodes, with 8 cores on each, and others may have 5 nodes, 32 cores per node.
As Hadoop runs on JVM's on each node, am I guessing correctly that multi-threaded performance on multi-core nodes is as good as the Java runtimes ability to run on multi-core nodes? Or - is there support in Hadoop for multi-core nodes? Or is there in fact no support? Or is it less definitive - rather "the jvm will run slightly quicker on 4 cores, rather than 2" ? thanks, Rob Stewart
