QsNet is a Quadrics communications environment with SCI latency and bandwidth of up to 900 megabytes / sec (QsNet II). Due to the high cost of equipment, QsNet, as a rule, is used to build particularly large teraflop clusters .
Features
- Throughput: at the MPI level of about 900 MB / s.
- Delay Time: 3 μs.
- Topology: Fat Tree . The architecture supports up to 1024 nodes (QsNet) and up to 4096 nodes (QsNet II).
- GNU / Linux software is distributed with source code under the GNU GPL and supports MPI (the specialized version of MPICH) and TCP / IP .
Below are the most commonly used types of communications for supercomputers and their main characteristics.
Other networks for supercomputers
- Gigabit ethernet
- Myrinet
- Scalable coherent interface
- Infiniband