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 

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 the par-multi queue
• If you choose to compile code for specific architectures, then it may not run elsewhere in the system