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Supercomputer Usage at NSF Centers

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FIGURE E.1 Total historical usage of all high-performance computers in the NSF MetaCenter. This graph shows the total annual usage of all high-performance computers in MetaCenter facilities. Particularly striking is the growth since 1 992, when microprocessors in various parallel configurations began to be employed. All usage has been converted to equivalent processor-years for a Cray Research Y-MP, the type of supercomputer that the NSF centers first installed in 1985-1986.

Table E. 1 shows the growth in the number of users and in the availability of cycles at the NSF supercomputer centers from 1986 to 1994. See also Figure E.1. The increase in capacity in 1993 was owing mainly to the introduction of new computing architectures. The slight decrease in the number of users reflects the centers' effort to encourage users able to meet their computational needs with the increasingly powerful workstations of the mid-1990s to use their own institutional resources.

TABLE E.1 Supercomputer Usage at National Science Foundation Supercomputer Centers, 1986 to 1994

Fiscal Year

Active Users

Usage in Normalized CPU HoursA

1986

1,358

29,485

1987

3,326

95,752

1988

5,069

121,615

1989

5,975

165,950

1990

7,364

250,628

1991

7,887

361,037

1992

8,578

398,932

1993

7,730

910,088

1994

7,431

2,249,562

AData prior to May 1 990 include the John von Neumann Center.



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