An apparatus dynamically reallocates resources for optimized job performance in a distributed heterogeneous computer system that includes a plurality of computer nodes. The apparatus includes an application injector to invoke at least one job to be performed on at least one computer node among the computer nodes. The apparatus further includes a collector to dynamically collect a workload value on each computer node. The apparatus further includes a job informer to determine known and unknown jobs on each computer node. The apparatus further includes a job optimizer to determine a data distribution vector based on the workload value and the known and unknown jobs on each computer node. The data distribution vector defines an amount of data to be distributed among the computer nodes to perform the at least one job.