Dear Ran,
you can only ask for GPUS PER NODE, as gres are ressources per node.
So, you can ask for 5 gpus and then get 5 gpus on each of the two nodes.
At the moment it is not possible to ask for 8 gpus on one node and 2 on
another.
That MIGHT change with slurm 19.05, since SchedMD is overhauling besides
pother things the gpu handling within slurm.
Best
Marcus
On 4/16/19 9:15 AM, Ran Du wrote:
Dear Antony,
It's worked!
I checked the allocation, and here is the record:
Nodes=gpu012 CPU_IDs=0-2 Mem=3072 GRES_IDX=gpu:v100(IDX:0-7)
Nodes=gpu013 CPU_IDs=0 Mem=1024 GRES_IDX=gpu:v100(IDX:0-7)
The job has got what it applied for.
And another question is : how to apply for multiple cards could
not be divided exactly by 8？ For example, to apply for 10 GPU cards, 8
cards on one node and 2 cards on another node?
Thanks a lot again for your kind help.
Best regards,
Ran
On Mon, Apr 15, 2019 at 8:25 PM Ran Du <bella.ran...@gmail.com
<mailto:bella.ran...@gmail.com>> wrote:
Dear Antony,
Thanks a lot for your reply, I tried to submit a job with
your advice, and no more sbatch errors.
But because our cluster is under maintenance, I have to
wait till tomorrow to see if GPU cards are allocated correctly. I
will let you know as soon as the job is submitted successfully.
Thanks a lot for your kind help.
Best regards,
Ran
On Mon, Apr 15, 2019 at 4:40 PM Antony Cleave
<antony.cle...@gmail.com <mailto:antony.cle...@gmail.com>> wrote:
Ask for 8 gpus on 2 nodes instead.
In your script just change the 16 to 8 and it should do
what you want.
You are currently asking for 2 nodes with 16 gpu each as Gres
resources are per node.
Antony
On Mon, 15 Apr 2019, 09:08 Ran Du, <bella.ran...@gmail.com
<mailto:bella.ran...@gmail.com>> wrote:
Dear all,
Does anyone know how to set #SBATCH options to get
multiple GPU cards from different worker nodes?
One of our users would like to apply for 16 NVIDIA
V100 cards for his job, and there are 8 GPU cards on each
worker node, I have tried the following #SBATCH options:
#SBATCH --partition=gpu
#SBATCH --qos=normal
#SBATCH --account=u07
#SBATCH --job-name=cross
#SBATCH --nodes=2
#SBATCH --mem-per-cpu=1024
#SBATCH --output=test.32^4.16gpu.log
#SBATCH --gres=gpu:v100:16
but got the sbatch error message :
sbatch: error: Batch job submission failed:
Requested node configuration is not available
And I found a similar question on stack overflow:
https://stackoverflow.com/questions/45200926/how-to-access-to-gpus-on-different-nodes-in-a-cluster-with-slurm
And it is said that multiple GPU cards allocation on
different worker nodes are not available, the post is in
2017, is it still true at present?
Thanks a lot for your help.
Best regards,
Ran
--
Marcus Wagner, Dipl.-Inf.
IT Center
Abteilung: Systeme und Betrieb
RWTH Aachen University
Seffenter Weg 23
52074 Aachen
Tel: +49 241 80-24383
Fax: +49 241 80-624383
wag...@itc.rwth-aachen.de
www.itc.rwth-aachen.de
