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Forkhead #654

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merged 5 commits into from
Oct 14, 2022
Merged

Forkhead #654

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eaae467
Merge branch 'develop' of https://github.com/rug-cit-hpc/league-of-ro…
scimerman Oct 13, 2022
b77a74d
Forkhead: slurm configs
scimerman Oct 14, 2022
e45e4fb
Merge branch 'develop' of https://github.com/rug-cit-hpc/league-of-ro…
scimerman Oct 14, 2022
30474f7
Merge branch 'develop' into forkhead
pneerincx Oct 14, 2022
d7e96a3
Memory calculation fix
scimerman Oct 14, 2022
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10 changes: 4 additions & 6 deletions static_inventories/forkhead_cluster.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -28,29 +28,27 @@ all:
hosts:
forkhead:
slurm_sockets: 1
slurm_cores_per_socket: 4 # 64 after being resized
slurm_cores_per_socket: 4
slurm_real_memory: 15884
slurm_local_disk: 0
slurm_features: 'tmp12'
slurm_ethernet_interfaces:
- eth0
- eth1
compute_vm:
children:
regular: # Must be item from {{ slurm_partitions }} variable defined in group_vars/{{ stack_name }}/vars.yml
hosts:
forkhead:
vars:
slurm_sockets: 1
slurm_cores_per_socket: 4 # 64 after being resized
slurm_cores_per_socket: 4
slurm_real_memory: 15884
slurm_max_cpus_per_node: "{{ slurm_sockets * slurm_cores_per_socket - 8 }}"
slurm_max_mem_per_node: "{{ slurm_real_memory - 8 * 2048 }}"
slurm_max_cpus_per_node: "{{ slurm_sockets * slurm_cores_per_socket - 2 }}"
slurm_max_mem_per_node: "{{ slurm_real_memory - 8 * 512 }}"
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@pneerincx pneerincx Oct 14, 2022 •
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When the amount of RAM, we want to reserve for the OS and everything else that is not a Slurm job, does not depend on the amount of cores, it does not make sense to multiply values here. Instead of
slurm_max_mem_per_node: "{{ slurm_real_memory - 8 * 512 }}"
you can just use:
slurm_max_mem_per_node: "{{ slurm_real_memory - 4096 }}"
That will fail though on a small VM, which only has 4096 GB RAM in total.
slurm_max_mem_per_node: "{{ slurm_real_memory - slurm_sockets * slurm_cores_per_socket * 512 }}"
is a more flexible setup.

slurm_local_disk: 0
slurm_features: 'tmp12'
slurm_ethernet_interfaces:
- eth0
- eth1
chaperone:
hosts:
fh-chaperone:
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