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Computer Communications
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Nectar is a “network backplane” for use in heterogeneous multicomputers. The initial system consists of a star-shaped fiber-optic network with an aggregate bandwidth of 1.6 gigabits/second and a switching latency of 700 nanoseconds. The system can be scaled up by connecting hundreds of these networks together.The Nectar architecture provides a flexible way to handle heterogeneity and task-level parallelism. A wide variety of machines can be connected as Nectar nodes and the Nectar system software allows applications to communicate at a high level. Protocol processing is off-loaded to powerful communication processors so that nodes do not have to support a suite of network protocols.We have designed and built a prototype Nectar system that has been operational since November 1988. This paper presents the motivation and goals for Nectar and describes its hardware and software. The presentation emphasizes how the goals influenced the design decisions and led to the novel aspects of Nectar.