%T An extension of the processor farm using a tree architecture
%A  S. A. Green,  Derek J. Paddon
%E  Charlie Askew
%B OUG\-9: Occam and the Transputer \-\- Research and Applications
%X For problems that require a small database a processor farm
   model was proposed by May and Sheppard, and has subsequently
   had much success. Here, we assume that the database is too
   large to store completely at each node of the farm and
   consequently, data must be communicated throughout the
   network during the execution of a problem. The processor
   farm model is extended to allow work tasks to be completed
   when data items not resident locally at a node can be
   obtained by making a request for data across the network.
   The farm model is further extended by configuring the system
   as a tree topology. The extended farm topology is evaluated
   by using a set of graphics benchmark problems. Benchmark
   results are given for a tree farm of upto fifteen worker
   processors.