Ra - Sun cluster, UPPMAX, Uppsala
The cluster, giving the total peak performance of 1.34 TFlops/s, consists of 99 nodes with 280 CPU cores, 688 GB of distributed memory and 16 TB of disk space. It is configured as:
- Front-end: Sun Fire V20z server;
- Back-end:
- 64 nodes Sun Fire V20z server (9.6 GFlops/s): 2 AMD Opteron 250 procesors, 1 MB of L2 cache per core, 4 GB of shared memory, 150 GB of local disk space;
- 32 nodes Sun Fire V40z server (19.2 GFlops/s): 4 AMD Opteron 850 procesors, 1 MB of L2 cache per core, 12 GB of shared memory, 300 GB of local disk space;
- 3 nodes Sun Fire V40z server (35.2 GFlops/s): 4 AMD Opteron 875 dual core procesors, 1 MB of L2 cache per core, 16 GB of shared memory, 300 GB of local disk space;
- Interconnection:
- a fast low-latency InfiniBand fabric, the main switch is TopSpin 270 with 96 ports, each running at 4X speed or 10Gbit/s;
- Gigabit Ethernet through a HP switch.
- Shared disk system consists of six SUN StorEdge 6120 disk arrays in a 2 controller configuration giving a total of 12 TB raw storage capacity.
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"Ra - Sun cluster", 600, 397 ))
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The operating system is Scientific Linux (SL303), which is a Red Hat Enterprise Linux recompiled from source. Installed software includes Sun Grid Engine for distributed resource management, a family of Portland Group compilers 5.2 and 6.0 and MPI implementations MPICH and SCALI for message-passing communication of parallel processes.