The XD1 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 Linux, and the machine's load balancing / resource management system is an enhanced version of Sun Microsystems' Sun Grid Engine.
|This supercomputer-related article is a stub. You can help Wikipedia by expanding it.|