CRI Cray C90

Cray Research, Inc.
Clock Speed: 
Dates Used: 
Wednesday, January 1, 1997 to Tuesday, November 30, 1999
Microprocessor Peak Teraflops: 
Memory (terabytes): 
Number of Processors: 
Electrical Power Consumption: 
493.50 kW
Storage (terabytes): 

Productivity of NCAR's Climate Simulation Laboratory (CSL) was dramatically enhanced in December 1996 with the addition of a CRAY C90 named antero. The C90 offered more than a factor of four increase in computing power over its predecessor (a CRAY Y-MP/8I).

As the linchpin of the Climate System Laboratory (CSL), antero was dedicated to extensive climate simulations, providing 10,400 CPU hours per month for CSL users. The NCAR Climate Systems Model (CSM) averaged approximately 5.2 gigaflops on the C90 and could simulate five years per day of wall-clock time; less than one month was required to simulate a century.

Antero had 16 processors, a clock period of 4 nanoseconds, 256 megawords (2 gigabytes) of central memory, a eight gigabytes of Solid State Disk, 250 gigabytes of disk space, and HIPPI connectivity to the Mass Storage System.

Antero ran the UNICOS operating system, supported the Fortran 77/90, C, and C++ compilers, and offered many vendor-supplied utilities as well as mathematical and statistical software. The machine was suitable for long-running multitasked jobs, jobs with very large I/O requirements, and interactive and batch jobs requiring up to 48 megawords of memory.

Antero was decommissioned on November 30, 1999.