Hi, I have a question related to VM reuse in Hadoop.I now understand the purpose of VM reuse , but I am wondering how is it useful.
Example. for VM reuse to be effective or kicked in , we need more than one mapper task to be submitted to a single node (for the same job).Hadoop would consider spawning mappers into nodes which actually contains the data , it might rarely happen that multiple mappers are allocated to a single task tracker. And even if a single task nodes gets to run multiple mappers then it might as well run in parallel in multiple VM rather than sequentially in a single VM. I am sure I am missing some link here , please help me find that. Thanks, Rahul
