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.
System Specs
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
More Information
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.
