Parts/Interconnect/Cray SeaStar2+
Why this part
A 3D torus wires each node to six neighbours and wraps the edges, so there are no switches at all: every node routes for its neighbours. That makes the network cost linear in node count rather than superlinear, which is why Cray could build Jaguar at a scale a fat tree would have priced out. The cost is distance, since a message may cross many hops, and it works because the physics codes these machines ran mostly talk to their neighbours.
Systems using this part
- Systems
- 1
- Rmax underneath
- 1.76 PFlop/s
- Units recorded
- -
0 of 1 edges disclose a quantity
| System | Role | Country | Units | System Rmax | Supplied by | Rank |
|---|---|---|---|---|---|---|
| Jaguar 2009-11 | Interconnect | USA | - | 1.76 PFlop/s | Cray now Hewlett Packard Enterprise | #1 → |
“Units recorded” sums only the edges where a public source states a quantity. It is a floor, not a total, and should never be read as installed base.