Anton 2: Raising the Bar for Performance and Programmability in a Special-Purpose Molecular Dynamics Supercomputer

TLDR

Anton 2 is a second‑generation special‑purpose supercomputer for molecular dynamics that delivers markedly higher performance, programmability, and capacity than its predecessor, Anton 1. Its fine‑grained, event‑driven architecture overlaps computation with communication and supports a broader range of algorithms, enabling numerous software‑based optimizations. A 512‑node Anton 2 machine runs up to ten times faster than Anton 1, simulates multiple microseconds of physical time per day for millions‑atom systems, and processes a 23,558‑atom benchmark at 85 µs/day—180 times faster than commodity hardware or general‑purpose supercomputers.

Abstract

Anton 2 is a second-generation special-purpose supercomputer for molecular dynamics simulations that achieves significant gains in performance, programmability, and capacity compared to its predecessor, Anton 1. The architecture of Anton 2 is tailored for fine-grained event-driven operation, which improves performance by increasing the overlap of computation with communication, and also allows a wider range of algorithms to run efficiently, enabling many new software-based optimizations. A 512-node Anton 2 machine, currently in operation, is up to ten times faster than Anton 1 with the same number of nodes, greatly expanding the reach of all-atom bio molecular simulations. Anton 2 is the first platform to achieve simulation rates of multiple microseconds of physical time per day for systems with millions of atoms. Demonstrating strong scaling, the machine simulates a standard 23,558-atom benchmark system at a rate of 85 μs/day -- 180 times faster than any commodity hardware platform or general-purpose supercomputer.