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Cray XD1
The Cray XD1 supercomputer range, made by Cray Inc., uses AMD Opteron 64-bit CPUs, and utilizes the Direct Connect Architecture over HyperTransport to remove the bottleneck at the PCI and contention at the memory. The MPI latency is ¼ that of Infiniband, and 1/30 that of Gigabit Ethernet.
Announced on 4 October 2004, the Cray XD1 range incorporate Xilinx Virtex-II Pro FPGAs for application acceleration. With 12 CPUs in a chassis, and up to 12 chassis installable in a rack, XD1 systems may hold several 144-CPU multiples in multirack configurations. The operating system used on the XD1 is a customized version of GNU/Linux, and the machine's load balancing / resource management system is an enhanced version of Sun Microsystems' GridEngine.
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10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details