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Incrementally scalable optical interconnection network with a constant degree and constant diameter for parallel

A Louri, C Neocleous

    Applied Optics
    |February 9, 2008
    PubMed
    Summary
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    A novel spanning-bus connected hypercube (SBCH) topology is introduced for massively parallel systems. This scalable network combines hypercube and spanning-bus features, offering high performance and fault tolerance for diverse computations.

    Area of Science:

    • Computer Architecture
    • Parallel Processing
    • Network Topology

    Background:

    • Existing interconnection topologies like hypercubes and spanning-bus hypercubes have limitations in scalability and performance for massively parallel systems.
    • Massively parallel systems require efficient communication and interconnection networks to handle complex computations.
    • The need for scalable, fault-tolerant, and high-performance network topologies is critical for advancing parallel computing.

    Purpose of the Study:

    • To propose a new scalable interconnection topology, the spanning-bus connected hypercube (SBCH), suitable for massively parallel systems.
    • To combine the advantages of hypercube and spanning-bus hypercube topologies while mitigating their respective drawbacks.
    • To demonstrate the SBCH's capability to support various communication patterns and maintain constant node degree and diameter for large processor counts.

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    Main Methods:

    • The SBCH topology is constructed by using hypercubes as basic building blocks interconnected via multidimensional spanning buses.
    • An optical implementation methodology is proposed, integrating free-space optics and wavelength-division multiplexing (WDM).
    • The feasibility of the proposed SBCH network is analyzed.

    Main Results:

    • The SBCH topology offers a combination of hypercube benefits (e.g., small diameter, high connectivity, fault tolerance) and spanning-bus hypercube benefits (e.g., constant node degree, scalability).
    • The SBCH efficiently supports diverse communication patterns, including bus-based, mesh-based, tree-based, and hypercube-based problems.
    • The network demonstrates the ability to scale to a large number of processors while maintaining a constant degree and diameter, alongside symmetry and incremental scalability.

    Conclusions:

    • The proposed spanning-bus connected hypercube (SBCH) topology is a highly scalable and efficient interconnection solution for massively parallel systems.
    • The SBCH's unique architecture provides superior performance, fault tolerance, and flexibility in supporting various computational communication patterns.
    • The proposed optical implementation methodology further enhances the feasibility and potential of the SBCH for future high-performance computing architectures.