Cray Sonexion Hardware
The Cray Sonexion’s modular, compact design keeps costs low while delivering the right performance for compute clusters and applications of all types. Sonexion’s compact form factor reduces the total storage hardware infrastructure (cables, servers, components and racks) required for sustaining production-grade, petascale deployments — by 50% on average over custom, component-based configurations. The architecture of the Cray Sonexion consists of preconfigured storage modules that can be easily expanded using integrated building blocks.
- Metadata Management Unit (MMU)
- Scalable Storage Unit (SSU)
- InfiniBand network fabric switches for data
- Ethernet management switch for management
The Cray Sonexion comes preconfigured and optimized for scaling Lustre without redesign. Cray’s Lustre design ensures optimum performance configurations across the spectrum of Lustre: from initial deployments to multi-petabyte file systems. Storage operators simply add SSUs (capacity and performance) or expansion modules to meet the performance and capacity objectives of the storage system. Each file system will vary based on number of SSUs and expansion modules to meet the individual bandwidth and usable capacity requirements for each storage system. Each 42U rack comes with two InfiniBand switches for linking the MMU, SSUs and Lustre clients. The rack also contains all power supplies, InfiniBand and Ethernet cabling, and a dual Gigabit Ethernet switch for management system connections to individual components.
A base MMU is configured in a 2U 24-bay 2.5" drive enclosure with 22 10K RPM disk drives and two solid state drives. A 5U MMU is also available with up to 80 15,000 RPM SAS drives, enabling higher metadata performance.
A base SSU is housed in a 5U 84-bay 3.5" drive enclosure with 80 drives used to provide data storage in an 8 x (8+2) RAID6 target configuration, two global hot spares and two solid state drives. An SSU expansion enclosure, which has the same drive configuration as the base SSU, can be added to double the usable capacity for a given bandwidth.