LOTUS cluster specification
LOTUS nodes
LOTUS is a cluster of over 300 nodes/hosts and 19000 CPU cores. A node/host is an individual computer in the cluster with more than 1 processor. Each node/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 available per node/host.
To select a node/host with a specific processor model and memory, add the following SLURM directive to your job script #SBATCH --constraint="<host-group-name>"
For example #SBATCH --constraint="skylake348G"
IMPORTANT: ‘intel’ and ‘amd’ node types are defined in the SLURM configuration as a feature:
- For any Intel node type use
#SBATCH --constraint="intel"
while for a specific Intel CPU model then use the host group name (Table 1) e.g.#SBATCH --constraint="skylake348G"
- For AMD use
#SBATCH --constraint="amd"
Table 1. LOTUS cluster specification
Host group name | Number of nodes/hosts |
Processor model | CPUs per host |
RAM |
|
|
|||
haswell256G -retired | 7 | Intel Xeon E5-2650-v3 "Haswell" | 20 | 256 GB |
broadwell256G | 37 | Intel Xeon E5-2640-v4 "Broadwell" | 20 | 256 GB |
|
|
|
|
|
ivybridge2000G -retired | 3 | Intel Xeon E7-4860-v2 "Ivy Bridge" | 48 | 2048 GB |
skylake348G | 151 | Intel Xeon Gold-5118 "Skylake" | 24 | 348 GB |
epyctwo1024G | 200 | AMD | 48 | 1024 GB |
|
Notes
-
There are 10 nodes of node type
skylake348G
with SSD disk mounted on /tmp - LOTUS nodes of node type
epyctwo1024
are not available yet on thepar-multi
queue - If you choose to compile code for specific architectures, then it may not run elsewhere in the system