The Tri-Lab Operating System Stack (TOSS) was initially created to run on LC HPC systems. The goal of the TOSS project has been to increase efficiencies in the ASC Tri-Lab community with respect to both the utility and the cost of a common computing environment. The project delivers a fully functional cluster operating system, based on Red Hat Linux, capable of running MPI jobs at scale on hardware across the Tri-Lab complex. Today, practically all LLNL Livermore Computing systems run TOSS.

As time as passed and the project has evolved, more HPC sites have begun using TOSS, including NASA as their main OS for their NAS Clusters.

Compliance Baseline

The TOSS team partnered with DISA (Defense Information Systems Agency) to create a STIG (Security Technical Implementation Guide) see the official DISA announcement for more details. The guide itself can be found and downloaded at: https://public.cyber.mil/stigs/downloads/

Supported Versions

As TOSS is built on RedHat Enterprise Linux, the versions (and support) tend to be directly related to the release and support of the "upstream" RHEL versions.