The Ares cluster is composed of one rack of compute nodes and one rack of storage nodes. All the nodes share a 48TB RAID-5 storage pool comprised of eight 8TB 7200K SAS hard drives. Nodes in each rack are connected with 40Gbps Ethernet with RoCE support. One 200Gbps uplink connects two racks of nodes. The compute rack consists of one ThinkSystem SR650 master node, 32 ThinkSystem SR630 compute nodes. In total, the compute rack has 66 2.2GHz Xeon Scalable Silver 4114 processors with boosted frequency up to 3.0GHz, which leads to 660 cores and 1320 threads. The master node and the compute nodes are equipped with 96GB and 48GB DDR4-2400 memory, 128GB and 32GB M.2 SSD for OS, respectively. 24 compute nodes are equipped with one 250GB M.2 Samsung 960 Evo SSD. The other eight are equipped with one 256GB M.2 Toshiba RD400 SSD. The storage rack is an upgraded Sun rack with 32 Sun Fire X2200 nodes. Each storage node is equipped with two quad-core Opteron 2376 processors running at 2.3GHz, 32GB DDR2-667 memory, one 250GB Samsung 860 Evo SATA SSD, and one 1TB Seagate 7200K SATA hard drive.
The HEC cluster is comprised by 16 Sun Fire X2200 nodes and one Sun Fire X4240 head node. This mini cluster is ideal for InfiniBand-related tests. All nodes are connected with InfiniBand network powered by Mellanox InfiniHost III Ex adapters. The 5TB RAID-5 storage pool provides the global storage for all the nodes. The X4240 node, serving as the master node, is equipped with two quad-core 2.7GHz Opteron 2384 processors, 32GB DDR2-667 memory and two 250GB Samsung 860 Evo SATA SSDs in RAID-1 configuration. The X2200 nodes, serving as the compute nodes, are equipped with two quad-core Opteron 2376 processors running at 2.3GHz, 16GB DDR2-667 memory, one 100GB OCZ RevoDrive X2 PCIe SSD, and one 1TB Seagate 7200K SATA hard drive.