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Compute nodes & Slurm
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You can ssh to a node where a job of yours is running, if (and only if) you have a valid ssh-key pair. (e.g. on a login node: ssh-keygen -t ed25519; ssh-copy-id albedo1)
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A submitted job has/needs the following information/resources:
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-J or --job-name=...
New on albedo (was not necessary on ollie)
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e.g.,
clidyn.clidyn
computing.tsunami
clidyn.p_fesom
Login
- You have to be member of HPC_user (can be applied for on id.awi.de)
- The login nodes can be accessed via
ssh albedo0.dmawi.de and ssh albedo1.dmawi.de
→ If you do not familiar with ssh and/or bash you should start here https://spaces.awi.de/x/-q1-Fw for a basic introduction. - Please do not use these nodes for computing, please use the compute nodes (see section Computenodes&Slurm below)
- HPC resources are not available from remote for security reasons (VPN is possible, https://spaces.awi.de/x/Smr-Eg).
- By using albedo you accept our HPC data policy https://spaces.awi.de/x/GgrXFw
Software
Albedo is running the operating system Rocky Linux release 8.6 (Green Obsidian).
Slurm 22.05 is used as the job scheduling system. Important details on its configuration on Albedo are given here: Slurm.
Details on the user software can be found here: Software.
... environment modules
Reference Slurm
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-N or --nodes=...
-n or --ntasks=--ntasks-per-node=...
-c or --cpus-per-task=...
Needed for OpenMP
If -n N and -c C is given, you get N x C cores.
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Memory/RAM per CPU
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--mem=...
Maximum walltime
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-t or --time=...
-p or --partition=...
Partitions
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QOS
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Useful SLURM commands
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