Recursive Individually Distributed Object

摘要

Distributed Objects as defined by OMG's CORBA architecture provide a model for object-oriented parallel distributed compting. The parallelism in this model however is limited in that the distribution refers to the mappings fo different objects to different hosts, and not to the distribution of any individual object. We propose in this paper an alternative model called individually distributed Object which allows a single large object to be distributed over a network, thus providing a high level interface for the exploitation of parallelism inside the computation of each object which was left out of the distributed objects model. Moreovr, we propose a set of functionally orthogonal operations for the ojbects which allow the objects to be recursively divided, combined, and communicate over recursively divided address space. Programming by divide-and-conquer is therofore effectively supported under this framework. The Recursive Individually dirstributed Object has been adopted as the primary parallel porgramming model in the Brokered Objects for Ragged-network Gigaflops projects at the Applied Physics Laboratory fo Johns Hopkins University, and applied to large-scale real-world problems.