Map - Reduce ( node choice when busy)



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Replication is (1+2), node 1 is busy and not available for map-red, the task will be run on the same rack copying data from node 1 or task will be run on second rack where the data is available?

Would you please help me understand? Thanks

1 Answer(s)


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If the given node is buzy and no resources are available, then the JobTracker will give the mapRed task to a different node where resources are available, during that time the give node will temporarily copy the block for processing