| Table of Contents | ||||
|---|---|---|---|---|
|
Technical Details
System Component | Configuration |
|---|---|
Compute Nodes | |
CPU Type | AMD EPYC 7352 |
Sockets | 2 |
Cores/socket | 24 |
Clock speed | 2.3 GHz |
Memory | 256 GB RAM |
Local Storage | 512GB Micron 1300 SSD (/scratch) |
Memory Bandwidth | 409.6 GB/s |
System | |
Total Compute Nodes | 44 |
Total Compute Cores | 2,112 |
Total Memory | 11.6 TB |
Total Storage | 342 TB |
Interconnect | Mellanox Infiniband EDR |
Link bandwidth | 100 Gb/s |
MPI Latency | 1.64 µs |
Systems Software Environment
Software | Description |
|---|---|
Operating System | CentOS Linux 7.9 |
Cluster Management | Scyld Clusterware 11.0 |
Compilers | AOCC, GCC, Clang, Go |
Parallel Frameworks | Open MPI, MVAPICH2, Sandia OpenSHMEM |
System Access
To use the Lotus cluster, you must first request an account on the system. Rhodes College faculty, students, and staff may send an email to helpdesk@rhodes.edu requesting should submit a request using the following form for gaining access to the cluster. :
Rhodes HPC Cluster Access Request Form
Non-Rhodes users must have a guest researcher account that is sponsored by a Rhodes faculty or staff member.
...
Other useful module commands are listed below:
Command | Description |
|---|---|
| List the modules that are currently loaded |
| List the modules that are available to be loaded |
| Show the environment variables modified by the <module_name> module |
| Load the module <module_name> into the environment |
| Remove the module <module_name> from the environment |
| Replace <mod1> with <mod2> in the environment |
Job Charging and Queue Limits
...
To compile a program with the GNU toolchain use the following commands:
Serial | MPI | OpenMP | MPI+OpenMP | |
|---|---|---|---|---|
Fortran |
|
|
|
|
C |
|
|
|
|
C++ |
|
|
|
|
To compile your programs with AVX extensions, compile with the -march=core-avx2 compiler flag. You will probably want to use this in conjunction with normal optimization flags (i.e. -O3)
...
To compile a program with the AMD toolchain use the following commands:
Serial | MPI | OpenMP | MPI+OpenMP | |
|---|---|---|---|---|
Fortran |
|
|
|
|
C |
|
|
|
|
C++ |
|
|
|
|
Running Jobs on Lotus
Running programs on the cluster is done by interacting with the job scheduling system. Lotus uses the SLURM job scheduler for managing both batch jobs and interactive runs. You should not run computationally intensive tasks on the login nodes – use the compute nodes.
...