Astra is the first large-scale prototype system deployed under the Sandia
Vanguard program. The system is composed of 2,592 compute nodes, each of which contains two sockets that are populated with 28-core Cavium ThunderX2 64-bit Arm-v8 processors. The theoretical peak performance is more than 2.3 petaflops.
Peak Performance 2.3 PFLOPS Number of Nodes 2592 Total Memory Bandwidth 885 TB/s Total Memory Capacity 332 TB File System 403 TB (Lustre) Power Consumption 1.2 MW Interconnect Fabric Mellanox EDR InfiniBand (ConnectX-5) Fabric Topology 3-Level Fat Tree, 2:1 L1 Taper Compute Racks 36 Chassis per Rack 18 Nodes per Chassis 4
Compute Node Specs
Processor Cavium Thunder-X2 CN99xx Frequency 2.0 GHz Chores 28 Sockets 2 Memory Capacity per Socket 64 GB Memory Controllers per Socket 8 Memory Speed DDR4-2666 Network I/O Per Socket 1 PCIe x8 link
Sandia press release for Astra. Vanguard Astra: Maturing the ARM Software Ecosystem for US DOE/ASC Supercomputing. Kevin T. Pedretti, James H. Laros III, Simon Hammond, Invited talk at the 2018 Workshop on Communication Architectures for HPC, Big Data, Deep Learning, and Clouds at Extreme Scale, June 2018. Maturing the ARM Software Ecosystem for US DOE/ASC Supercomputing. Kevin T. Pedretti, James H. Laros III, Simon Hammond, 2018 SIAM Conference on Parallel Processing for Scientific Computing, March 2018. Astra is the first Arm system to make the TOP500 list at #203.