The DMC at the Alabama Supercomputer Center has 2380 CPU cores and 13 terabytes of distributed memory. Each compute node has a local disk (up to 1.9 terabytes of which are accessible as /tmp). Also attached to the DMC is a high performance GPFS storage cluster, which has 45 terabytes of high performance storage accessible as /scratch from each node. Home directories as well as third party applications use a separate GPFS volume and share 137 terabytes of storage.
The machine is physically configured as a cluster of 8, 20, 36, or 192 CPU core SMP boards. Thirty-nine nodes have 2.5 GHz Intel 10-core Xeon Ivy Bridge processors and 128 gigabytes of memory. Twelve nodes have 2.1 GHz Intel 18-core Xeon Broadwell processors and 128 GB of memory. One node has 2.1 GHz Intel 24-core Skylake-SP processors and 6 TB of memory. Twenty-four nodes have 2.5 GHz Intel 18-core Xeon Skylake-SP processors and 48 GB of memory.
The DMC has 14 NVIDIA GPU (Graphic Processing Unit) chips. These are a combination of: three DMC nodes configured with four Kepler K20m cards each, and one node with two Pascal P100 cards. These multicore GPU chips are similar to those in video cards, but are installed as math coprocessors. This can give significant performance advantages for software that has been adapted to use these processors. Thus the processing capacity of the DMC cluster is:
- Conventional processing capacity - 135 TFLOPs
- Single precision GPU capacity - 63 TFLOPs
- Double precision GPU capacity - 25 TFLOPs