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System Configuration:
SGI Altix 3700 Supercomputer Orion is an SGI Altix 3700 supercomputer, which consists of 128 Itanium-2 processors, and 256 Gigabytes of main memory. It is based on a Distributed Shared Memory (DSM) architecture, where memory is physically distributed among 32 Computation-bricks (''C-bricks''). Each C-brick consists of two pairs of 1.3GHz Itanium-2 64-bit processors, locally attached memory, cache-coherence logic and interconnection fabric. The Altix 3000 class of computers provide a global, cache-coherent, Non-Uniform Access Time (cc-NUMA) shared memory. The operating system of cosmos is the IA-64 version of Linux with several SMP and NUMA-aware enhancements provided by SGI and the OSS community. The operating system runs as a Single System Image (SSI) on the 128 PEs of cosmos. We are currently using SGI ProPack 4 which is based on the 2.6 distribution of the Linux kernel. Orion is directly attached to a 10 Terabyte TP9500 RAID system via four 2-Gigabit/sec fibre-channel connections. Resource management for job scheduling is provided with the Portable Batch System (PBS). |