1. A method for fault tolerance management of workers nodes during map/reduce computing in a computing cluster, the method comprising: subdividing a computational problem into a set of sub-problems in a map/reduce module executing in memory by at least one processor of a computer, and mapping a selection of the sub-problems in the set to respective nodes in a computing cluster; directing processing of the sub-problems in the respective nodes and collecting results from completion of processing of the sub-problems in the respective nodes; detecting failed ones of the nodes during a first early temporal portion of processing the computational problem and directing re-processing of sub-problems in response to detecting the failed ones of the nodes; replicating into other nodes, sub-problems in nodes not yet completely processed, directing processing of the replicated sub-problems in the other nodes, and collecting results from completion of processing of sub-problems in each of the other nodes during a second later temporal portion of processing the computational problem; and, removing duplicate results collected for the replicated sub-problems and reducing the results into a result set for the problem.