Supercomputing Division, Information Technology Center, The University Tokyo

Past systems

This section introduces the changes to the large-scale general-purpose computer systems and supercomputer systems that have been in service at the Information Technology Center (Computer Center) from the past.

Systems

(Massively) Parallel supercomputers

Operational period Model (main storage capacity) Theoretical computational performance
1996 ~ 2001
HITACHI SR2201 (1024 nodes, 256 MB/nodes) 307.2 GFlops
1999 ~ 2005
HITACHI SR8000 (128 nodes, 8 GB/nodes)
1,024.0 GFlops
2001 ~ 2007 HITACHI SR8000/MPP (144 nodes, 16 GB/nodes) 2,073.6 GFlops
2005 ~ 2007 HITACHI SR11000/J1 (44 nodes, 128 GB/nodes) 5,350.4 GFlops
2007 ~ 2011 HITACHI SR11000/J2 (128 nodes, 128 GB/nodes) 18,841.6 GFlops
2008 ~ 2014 HITACHI HA8000-tc/RS425 (952 nodes) 140,134.4 GFlops
2011 ~ 2017 HITACHI SR16000/M1 (Compute nodes: 56 nodes, 200 GB/node) 54,906.4 GFlops
2012 ~ 2018 FUJITSU PRIMEHPC FX10: Oakleaf-FX
(Compute nodes: 4800 nodes)
1.135 PFlops
2014 ~ 2018 FUJITSU PRIMEHPC FX10: Oakbridge-FX
(Compute nodes: 576 nodes)
136.2 TFlops
2016 ~ 2020 SGI Rackable C2112-4GP3: Reedbush-U
(Compute nodes: 420 nodes, 256 GB/node)
508.03 TFlops
2017 ~ 2021 SGI Rackable C1102-GP8: Reedbush-H
(Compute nodes: 120 nodes(GPU 240), 256 GB/node)
1418.2 TFlops
2017 ~ 2021 SGI Rackable C1102-GP8: Reedbush-L
(Compute nodes: 64 nodes(GPU 256), 256 GB/node)
1435.3 TFlops
2016 ~ 2022 Fujitsu PRIMERGY CX1640 M1: Oakforest-PACS
(Compute nodes: 8,208 nodes, 96 GB(DDR4)+16 GB(MCDRAM)/node)
25.004 PFlops
2019 ~ 2023 Fujitsu PRIMERGY CX2550 M5, Fujitsu PRIMERGY CX2560 M5: Oakbridge-CX
(Compute nodes: 1,368 nodes, 192 GiB/node)
6.61 PFlops

General-purpose computer systems

Operational period Model (main storage capacity)
1966 ~ 1973 HITAC 5020 (16 KW) / 5020E (65 KW) + HITAC 5020 (32 KW)
1973 ~ 1980 HITAC 8800 × 3 + HITAC 8700 × 1 (8 MB)
1980 ~ 1982 HITAC M-200H × 8 (64 MB)
1982 ~ 1985 HITAC M-280H × 6 (192 MB)
1986 ~ 1990 HITAC M-680H (128 MB) + HITAC M-682H (384 MB)
1991 ~ 1996
HITAC M-880/310 (MS: 1 GB, ES: 4 GB) + HITAC M-682H (256MB)
1996 ~ 2001 HITACHI MP5800/320 (MS + ES : 10GB)
2001 ~ 2007 Operational support system (MS + ES: 10 GB)

*1W = 4 byte, MS = Main storage device, ES = Extended storage device


Vector-supercomputers

Operational period Model (main storage capacity) Theoretical computational performance
1983 ~ 1987
HITAC S-810/20 (MS : 256 MB, ES : 512 MB)
800 MFlops
1988 ~ 1993 HITAC S-820/80 (MS : 512 MB, ES : 6 GB) 4 GFlops
1993 ~ 1999 HITAC S-3800/480 (MS : 2 GB, ES : 16 GB) 32 GFlops