Source : Free On-Line Dictionary of Computing

processor farm
     
         A {parallel processor} where tasks are
        distributed, or "farmed out", by one "farmer" processor to
        several "worker" processors, and results are sent back to the
        farmer.  This arrangement is suitable for {applications} which
        can be partitioned into many separate, independent tasks, the
        canonical examples being {ray tracing} and the {Mandelbrot
        set}.  In order to be efficient, the extra time spent on
        communications must be small compared to the time spent
        processing each task.
     
        (2001-05-28)