+ NASA Home + Ames Home + Sitemap + Staff Directory +Home HIGH END SYSTEMS + Pleiades + Columbia + Schirra CRAY OPTERON CLUSTER The Cray Opteron, a 64-node cluster, is the latest addition to the set of high-end computing resources at the NAS facility. The system is structured with a single "head" node, which controls the system operation and launches programs, and 63 compute nodes. System: Hostname - sn7417 Cray Opteron 64 Newisys™ 2100 nodes, each with 2 processors; 1 head node and 63 compute nodes Processors: 128 AMDRMk OpteronRMk processors Processor speed: 2 gigahertz Cache per processor: 1 megabyte Memory Head node: 4 gigabytes (GB) high-speed RAM Compute nodes: 2 GB per node 130 GB total memory Operating Environment SuSE LinuxRMk operating system, kernel version 2.4.21 PBS Pro 5.3 job scheduler Compilers: PGI 64-bit and 32-bit for Fortran, C, and C++ GNU 64-bit and 32-bit for C and C++ Interconnect Myrinet Storage 2300 GB ADDITIONAL INFORMATION + Getting an account at NAS + Cray Opteron Documentation + Feedback + Site Help + NASA Privacy Statement, Disclaimer, and Accessibility Certification Editor: Jill Dunbar Webmaster: John Hardman NASA Official: Rupak Biswas + Contact NAS Last Updated: March 27, 2009