Lassen
Lassen is similar to the classified Sierra system (same architecture) but smaller in size: ~20 petaFLOP/s peak performance compared to Sierra’s 125 petaFLOP/s peak. The system is designated for unclassified simulation and analysis.
Lassen was part of the contract that brought Sierra to Livermore, and it debuted in 2018 at No. 11 on the TOP500 List, one spot behind LLNL’s Sequoia. Lassen is shared by the Multiprogrammatic and Institutional Computing (M&IC) and Advanced Simulation and Computing (ASC) programs.
Processor Architecture
IBM Power and NVIDIA Volta processors
Operating System
RHEL
Processor Clock Rate/Process Clock Speed
3.4 GHz
Nodes
684
Cores per Node
44
Total Cores
29,304
Memory per Node
320 GiB
Total Memory
213,120 GB