High-Performance Computing (HPC) has evolved from a discipline solely concerned with efficient execution of code on parallel architectures to be more closely aligned with the field of distributed systems. Modern HPC is as much concerned with access to data and specialized devices in wide-area networks as it is with crunching numbers as quickly as possible. The focus of HPC has shifted towards enabling the transparent and most efficient utilization of a wide range of capabilities made available over networks, in as seamless a way as the electrical grid delivers electricity. Such a vision requires significant intellectual and architectural investment. This paper explores one service-oriented approach for enabling Internet-scale, high-performance applications based on work completed as part of the £250 million UK e-Science program.
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