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Don't suspend owl compute nodes
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Currently the owl nodes are located on top of the rack and turning them
off causes a high temperature increase at that region, which accumulates
heat from the whole rack. To maximize airflow we will leave them on at
all times. This also makes allocations immediate at the extra cost of
around 200 W.

In the future, if we include more nodes in SLURM we can configure those
to turn off if needed.

Fixes: #156
This commit is contained in:
Rodrigo Arias 2025-10-30 13:40:10 +01:00
parent 5ff1b1343b
commit b8ecc178e3
1 changed files with 1 additions and 36 deletions
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37
m/module/slurm-common.nix
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@ -1,31 +1,6 @@
{ config, pkgs, ... }:
let
suspendProgram = pkgs.writeShellScript "suspend.sh" ''
exec 1>>/var/log/power_save.log 2>>/var/log/power_save.log
set -x
export "PATH=/run/current-system/sw/bin:$PATH"
echo "$(date) Suspend invoked $0 $*" >> /var/log/power_save.log
hosts=$(scontrol show hostnames $1)
for host in $hosts; do
echo Shutting down host: $host
ipmitool -I lanplus -H ''${host}-ipmi -P "" -U "" chassis power off
done
'';
resumeProgram = pkgs.writeShellScript "resume.sh" ''
exec 1>>/var/log/power_save.log 2>>/var/log/power_save.log
set -x
export "PATH=/run/current-system/sw/bin:$PATH"
echo "$(date) Suspend invoked $0 $*" >> /var/log/power_save.log
hosts=$(scontrol show hostnames $1)
for host in $hosts; do
echo Starting host: $host
ipmitool -I lanplus -H ''${host}-ipmi -P "" -U "" chassis power on
done
'';
in {
{
services.slurm = {
controlMachine = "apex";
clusterName = "jungle";
@ -59,16 +34,6 @@ in {
# the resources. Use the task/cgroup plugin to enable process containment.
TaskPlugin=task/affinity,task/cgroup
# Power off unused nodes until they are requested
SuspendProgram=${suspendProgram}
SuspendTimeout=60
ResumeProgram=${resumeProgram}
ResumeTimeout=300
SuspendExcNodes=fox
# Turn the nodes off after 1 hour of inactivity
SuspendTime=3600
# Reduce port range so we can allow only this range in the firewall
SrunPortRange=60000-61000