LOTUS cluster specification
Details of the current LOTUS cluster
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.
Table 1. LOTUS cluster specification
Current host groups
| Host group name | Number of nodes/hosts | Processor model | CPUs per host | RAM |
|---|---|---|---|---|
| broadwell256G | 37 | Intel Xeon E5-2640-v4 “Broadwell” | 20 | 256 GB |
| skylake348G | 151 | Intel Xeon Gold-5118 “Skylake” | 24 | 348 GB |
| epyctwo1024G | 200 | AMD | 48 | 1024 GB |
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"Further notes
intel and amd node types are defined in the Slurm configuration as a feature:
#SBATCH --constraint="intel"#SBATCH --constraint="skylake348G" #SBATCH --constraint="amd"skylake348G with SSD disk mounted on /tmpepyctwo1024 are not available yet on the par-multi queue(For reference only)
| Host group name | Number of nodes/hosts | Processor model | CPUs per host | RAM |
|---|---|---|---|---|