LOTUS cluster specification
LOTUS Hosts
LOTUS is a cluster of over 500 hosts and 13000 CPU cores. A host/node is an individual computer in the cluster with more than 1 processor. Each host belongs to a specific host group. The number of processors (CPUs or cores) per host is listed in Table 1 with the corresponding processor model and the size of the physical memory RAM per host.
To select a host with a specific processor model and memory, add the following SLURM directive in your job script #SBATCH --constraint="<host-group-name>"
For example #SBATCH --constraint="skylake348G"
Table 1. LOTUS cluster summary: 13000 CPU cores (Note: LOTUS nodes of node type epyctwo1024 are not available yet on the par-multi queue)
Host group name | Number of hosts |
Processor model | CPUs per host |
RAM |
ivybridge128G | 193 | Intel Xeon E5-2650-v2 "Ivy Bridge" | 16 | 128 GB |
haswell256G | 12 | Intel Xeon E5-2650-v3 "Haswell" | 20 | 256 GB |
broadwell256G | 56 | Intel Xeon E5-2640-v4 "Broadwell" | 20 | 256 GB |
ivybridge512G | 16 | Intel Xeon E5-2650-v2 "Ivy Bridge" | 16 | 512 GB |
ivybridge2000G | 2 | Intel Xeon E7-4860-v2 "Ivy Bridge" | 48 | 2048 GB |
skylake348G | 128 | Intel Xeon Gold-5118 "Skylake" | 24 | 348 GB |
epyctwo1024G | 43 | AMD | 48 | 1024 GB |