ABSTRACT
Multiple processor systems may be divided into two general categories: parallel processors (multiprocessors) and distributed systems (multicomputers). The distributed simulations, that is, simulations implemented over distributed systems. Parallel processors are much more tightly coupled than distributed systems. Distributed systems are more general purpose systems and are suitable for enterprise-wide operations. A general definition for distributed systems was given at the New Advances in Distributed Computer Systems conference held at the NATO Advanced Study Institute in 1981. Although distributed systems have many of the attributes of MIMD-based parallel processors, distributed systems are more akin to a local area network (LAN) than a parallel processor. Unlike a parallel processing computer, which has all of its processors in the same box, distributed systems have their CPUs housed separately. Distributed systems provide the means to support computing needs across an organization. Shared memory systems allow all processors access to the global memory space, but generally they do not scale well.
