The Tri-Lab Operating System Stack (TOSS) is a

Linux distribution A Linux distribution (often abbreviated as distro) is an operating system made from a software collection that includes the Linux kernel and, often, a package management system. Linux users usually obtain their operating system by downloading one ...

based on

Red Hat Enterprise Linux Red Hat Enterprise Linux (RHEL) is a commercial open-source Linux distribution developed by Red Hat for the commercial market. Red Hat Enterprise Linux is released in server versions for x86-64, Power ISA, ARM64, and IBM Z and a desktop vers ...

(RHEL) that was created to provide a software stack for high performance computing (HPC) clusters for laboratories within the

National Nuclear Security Administration The National Nuclear Security Administration (NNSA) is a United States federal agency responsible for safeguarding national security through the military application of nuclear science. NNSA maintains and enhances the safety, security, and ef ...

(NNSA). The operating system allows multiple smaller systems to emulate a high-performance computing (HPC) platform.

Linux distribution

The name "tri-lab" refers to the three major NNSA labs, the Lawrence Livermore National Laboratory, the Los Alamos National Laboratory, and the Sandia National Laboratories. The OS is used by NNSA computers including the El Capitan supercomputer and systems using ARM architecture including the ThunderX2 system on a chip (SoC). In addition to being used by the National Nuclear Security Administration (NNSA), most of the systems in NASA's High-End Computing Capabiity Project, part of the

NASA Advanced Supercomputing Division The NASA Advanced Supercomputing (NAS) Division is located at NASA Ames Research Center, Moffett Field in the heart of Silicon Valley in Mountain View, California. It has been the major supercomputing and modeling and simulation resource for NA ...

, were all migrated to TOSS in March 2022. Many of the software packages included in TOSS are from the RHEL repository. Additional packages are built using

Fedora A fedora () is a hat with a soft brim and indented crown.Kilgour, Ruth Edwards (1958). ''A Pageant of Hats Ancient and Modern''. R. M. McBride Company. It is typically creased lengthwise down the crown and "pinched" near the front on both sides ...

's Koji build system to create RPM packages. The system also uses SLURM and Flux scheduling and resource management software.

References

{{category improve, date=August 2022 Linux distributions RPM-based Linux distributions