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Article

Angara interconnect makes GPU-based Desmos supercomputer an efficient tool for molecular dynamics calculations

Stegailov V., Dlinnova E., Ismagilov T., Khalilov M., Kondratyuk N., Makagon D., Semenov A., Simonov A., Smirnov G., Timofeev A.

In this paper, we describe the Desmos supercomputer that consists of 32 hybrid nodes connected by a low-latency highbandwidth Angara interconnect with torus topology. This supercomputer is aimed at cost-effective classical molecular dynamics calculations. Desmos serves as a test bed for the Angara interconnect that supports 3D and 4D torus network topologies, and verifies its ability to unite massively-parallel programming systems speeding-up effectively MPI-based applications. We describe the Angara interconnect presenting typical MPI benchmarks. Desmos benchmarks results for GROMACS, LAMMPS, VASP and CP2K are compared with the data for other HPC systems. Also, we consider the job scheduling statistics for several months of Desmos deployment.