Hi, I have a very basic question on MR jobs. Suppose I have a cluster 3 nodes out of which 1 NN and 3 DN. I wanted to run an MR job so I placed the jar on 1 of the cluster machine and executed, it runs fine. Now my question is do I need to copy my MR job to every DN for distributed processing? Or Placing MR jar on any of the machine does not make any difference , MR job will run in distributed fashion.
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