BAD HARDWARE WEEK

Kraken is a Cray XT5 system?. In its current configuration, Kraken has 48 cabinets, contating a total of 4512 compute nodes and 48 service nodes. Each compute node has 4 cores, for a total of 18048 compute cores.

Kraken runs Compute Node Linux (CNL) on each compute node. CNL is designed to minimize system overhead, thus allowing scalable low-latency global communication. Each of the compute nodes contain 2.3 GHz quad-core AMD Opteron processors and 4 GB of memory. The service nodes consist of a 2.3 GHz dual-core AMD Opteron processor with 8 GB of memory. Each node is connected to a Cray SeaStar router through HyperTransport, and the SeaStars are all interconnected in a 3-D-torus topology. The resulting interconnect has very high bandwidth, low latency, and extreme scalability.

EDIT: Cray XT5 is actually Jaguar system with 8 socket blades using quad core Opterons. I firmly believe that Jaguar uses AMD's new, not yet announced 45nm Deneb processors with 6MB L3 inside. That will surely push Kraken's 250 Tflops beyond Petaflops limit.

THIS LINK posted by Joseph Bell : 9:07 AM