Chacha

One of the two main research compute nodes for HPC usage, equipped with two NVIDIA H100 GPUs. Jobs are scheduled through SLURM.

At a glance

Role	Research compute node (HPC)
Hostname	chacha.hevs.ch
CPU	2× Intel Xeon Gold 6542Y @ 2.9 GHz (96 threads)
RAM	1 TB
GPU	2× NVIDIA H100 NVL (96 GB each)
SLURM partition	Chacha

Hardware

CPU

Model	Intel Xeon Gold 6542Y
Frequency	2.9 GHz
Architecture	x86_64
Sockets	2
Cores per socket	24
Threads per core	2
Total threads	96

Memory

RAM	1 TB
Swap	8 GB

GPU

Model	2× NVIDIA H100 NVL
Memory	96 GB (95 830 MiB) per GPU
Power cap	400 W per GPU
Driver / CUDA	535.216.03 / CUDA 12.2
Shards	maximum 96 shards per H100

Raw nvidia-smi output

+---------------------------------------------------------------------------------------+
| NVIDIA-SMI 535.216.03             Driver Version: 535.216.03   CUDA Version: 12.2     |
|-----------------------------------------+----------------------+----------------------+
| GPU  Name                 Persistence-M | Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp   Perf          Pwr:Usage/Cap |         Memory-Usage | GPU-Util  Compute M. |
|                                         |                      |               MIG M. |
|=========================================+======================+======================|
|   0  NVIDIA H100 NVL                On  | 00000000:CA:00.0 Off |                    0 |
| N/A   29C    P0              63W / 400W |      0MiB / 95830MiB |      0%      Default |
|                                         |                      |             Disabled |
+-----------------------------------------+----------------------+----------------------+
|   1  NVIDIA H100 NVL                On  | 00000000:E1:00.0 Off |                    0 |
| N/A   30C    P0              60W / 400W |      0MiB / 95830MiB |      0%      Default |
|                                         |                      |             Disabled |
+-----------------------------------------+----------------------+----------------------+

+---------------------------------------------------------------------------------------+
| Processes:                                                                            |
|  GPU   GI   CI        PID   Type   Process name                            GPU Memory |
|        ID   ID                                                             Usage      |
|=======================================================================================|
|  No running processes found                                                           |
+---------------------------------------------------------------------------------------+

Storage

Measured read / write performance:

Mount	Cached reads	Buffered disk reads	Sequential write
/data	10 206 MB/s	2 316 MB/s	1.2 GB/s

Capacity

To be discussed on each project integration.

SLURM

To target Chacha specifically, submit your jobs to its partition:

#SBATCH --partition=Chacha

See the SLURM configuration for partitions, accounts and QOS.

Access

Chacha is reachable at chacha.hevs.ch.

See Requesting access for details about requesting access.