Leonardo

Leonardo is a petascale supercomputer located at the CINECA datacenter in Bologna, Italy. The system consists of an Atos BullSequana XH2000 computer, with close to 14,000 Nvidia Ampere GPUs and 200Gb/s Nvidia Mellanox HDR InfiniBand connectivity. Inagurated in November 2022, Leonardo is capable of 250 petaflops (250 quadrillion operations per second), making it one of the top five fastest supercomputers in the world. It debuted on the TOP500 in November 2022 ranking fourth in the world, and second in Europe. Architecture The system is constructed as three separate "modules". The first, known as the "booster module", consists of 13,824 Nvidia A100 GPUs, grouped four per node, for a total of 3,456 nodes. This module will be capable of 240.50 LINPACK petaflops, and is expected to be online by autumn 2022. The second module, called the "data centric module", is made up of 1,536 Intel Sapphire Rapids CPUs, and will be capable of 8.97 LINPACK petaflops. These two computing modules will be complemented by a "front-end & service module", and backed by two storage systems; 5 PB of high IOPS storage with 1 TB/s bandwidth and 100 PB of high capacity storage with bandwidth. The components will be joined up by a 200 Gb/s InfiniBand interconnect. Booster Module The 3,456 individual nodes which make up the "booster module" are custom BullSequana X2135 "Da Vinci" blade servers, each composed of: 1x Intel Xeon 8358 CPU, with 32 cores running at 2.6 GHz 512 GB RAM DDR4 3200 MHz 4x NVidia custom Ampere GPU, 64GB HBM2 2x NVidia HDR InfiniBand network adapters, each with two 100 Gb/s ports