Hi, In running hadoop, is it possible to specify the number of computing nodes to use? Or does hadoop automatically configures to run on different nodes?
For example, if I specify 12 map tasks to run, and there are a cluster of 12 computing nodes, will hadoop automatically run one map task per node, or would it run 2 maps per node for 6 nodes, if it detects the node has a 2 core processor? Thank You, Han Dong [email protected]
