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Helios is a hybrid cluster. CPU nodes use x86_64 CPUs, while the GPU partition is based on GH200 superchips, which include an Nvidia Grace - ARM CPU and Nvidia Hopper GPU. HPE Slingshot is used as an interconnect. The login01 node uses an x86_64 CPU ; and RHEL 8, please keep that this in mind when compiling software, etc. Knowing the destination CPU architecture and operating system is important for selecting the proper modules and software. Node specification can be found below:
| Partition | Number of nodes | Operating system | CPU | RAM | Proportional RAM for one CPU | Proportional RAM for one GPU | Proportional CPU for one GPU | Accelerator |
|---|---|---|---|---|---|---|---|---|
| plgrid (includes plgrid-long) | 272 | RHEL 8 | 192 cores, x86_64, 2x AMD EPYC 9654 96-Core Processor @ 2.4 GHz | 384GB | 2000MB | n/a | n/a | |
| plgrid-bigmem | 120 | RHEL 8 | 192 cores, x86_64, 2x AMD EPYC 9654 96-Core Processor @ 2.4 GHz | 768GB | 4000MB | n/a | n/a | |
| plgrid-gpu-gh200 | 110 | CrayOS (SLES 15sp5) | 288 cores, aarch64, 4x NVIDIA Grace CPU 72-Core @ 3.1 GHz | 480GB | n/a | 120GB | 72 | 4x NVIDIA GH200 96GB |
Note that the machine Helios will soon be upgraded to RHEL 9 in the following nodes. The This change will be applied to all CPU and GPU nodes.
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