HITAC S-820
| Active | 1987 - |
|---|---|
| Memory | maximum 512MB |
| Speed | theoretical peak performance of 2 GFLOPS |
| Sources | [1] |
The HITAC S-820 is a family of vector supercomputers developed, manufactured and marketed by Hitachi.[1] Announced in July 1987, it was Hitachi's second supercomputer, succeeding the HITAC S-810. The S-820 is categorized as a second generation Japanese supercomputer.[1]
The S-820 system has both a scalar and vector processor, similar to the architecture of the S-810.[1][2] The scalar processor is based on the Hitachi M-series mainframe processor, so is compatible with its operating system.[1][2] The S-820 was reported to have a theoretical peak performance of 2 GFLOPS, and a theoretical maximum computational performance of 3 GFLOPS.[1]
Initially the S-820 was available in two variations: the S-820 model 80 and the S-820 model 60 (hereafter S-820/80 and S-820/60).[2] The S-820/80 had double the vector computational capability, as well as more storage capability, compared to the S-820/60.[2] The peak performance of the S-820/80 was 3 GFLOPS, and that of the S-820/60 as 1.5 GFLOPS.[2]
A team from the Institute for Supercomputing Research (Tokyo) and the Los Alamos National Laboratory benchmarked the S-820/80 against the similar generation NEC SX-2 and Cray X-MP/416, as well as the S-810, during early 1988.[1] They concluded that the S-820 was "a great deal faster in vector mode than any other supercomputer we have measured".[1]
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Eoyang, C.; Mendez, R. H.; Lubeck, O. M. (1 January 1988) (in English). The birth of the second generation: The Hitachi S-820/80. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). pp. 296–303. doi:10.1109/SUPERC.1988.44666. ISBN 0-8186-0882-X. https://www.osti.gov/biblio/6902360. Retrieved 15 September 2021.
- ↑ 2.0 2.1 2.2 2.3 2.4 Mendez, Raul H.; Orszag, Steven A., eds (1988) (in en). Japanese Supercomputing: Architecture, Algorithms, and Applications. Springer-Verlag. p. 129. ISBN 978-0-387-96765-3. https://www.springer.com/gp/book/9780387967653. Retrieved 15 September 2021.
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