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\title{Science AMA Series: We are Livermore Computing, home of the
supercomputers at Lawrence Livermore National Lab! AUA!}



\author[1]{Livermore_Computing }%
\author[1]{r/Science AMAs}%
\affil[1]{Affiliation not available}%


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  \date{April 23, 2026}


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\begin{abstract}
We are members of Livermore Computing (LC) at the Lawrence Livermore
National Laboratory (LLNL) in Livermore, California. LC is home to some
of the world's fastest supercomputers, including Sequoia, the 4th
fastest in the world. Scientists use our High Performance Computing
(HPC) machines to run physical simulations: from geology, astronomy, and
cardiac arrhythmia, to the US nuclear stockpile and other problems of
national interest. We bring in the machines, keep them running fast, and
provide scientists with the tools they need to run these simulations. We
have varying roles in system administration, software development, data
archiving, visualization, operations, facilities management, user
interfaces to the center and data, user support, and research. Our
developers lead and contribute to many open source projects: From Linux
kernel infrastructure like file systems, such as Lustre and ZFS on
Linux; to industry spanning cluster management tools, such as SLURM,
Flux, and pdsh; and beyond to all aspects of scientific and cluster
computing with spack, STAT, and SCR. For more info about our various
open source efforts, visit https://software.llnl.gov/. For more
information about our center, visit https://hpc.llnl.gov/. So if you
have a question about any part of running or using supercomputers at HPC
centers, we'll be back at 1 pm ET, feel free to ask and we will answer
as many questions as we can! EDIT: Good Morning from the West Coast! We
see that everyone has started asking fantastic questions! We will start
answering some questions! EDIT 2: Thanks for all the great questions. We
hope to come back soon. Next time, we plan to try to answer your
questions in parallel! Learn more, contact, or apply to join us here:
https://computation.llnl.gov/. Our thanks to Reddit and r/Science for
providing us with the opportunity to have this AUA! We leave you with a
photo of some of us in front of Sequoia today! Have a nice day everyone!
:)%
\end{abstract}%



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