[slurm-users] Prevent CLOUD node from being shutdown after startup

[Brian Andrus]

Xaver,

Your descriptions of cases is a bit difficult to understand. It seems 
you want to have exceptions for power_up. That could be done by 
filtering the list of nodes yourself with any script/method you like and 
then do power_up on the remaining list.

For excluding nodes from being suspended, there is an option in slurm.conf:

    SuspendExcNodes
    Specifies the nodes which are to not be placed in power save mode,
    even if the node remains idle for an extended period of time. Use
    Slurm's hostlist expression to identify nodes with an optional ":"
    separator and count of nodes to exclude from the preceding range.
    For example "nid[10-20]:4" will prevent 4 usable nodes (i.e IDLE and
    not DOWN, DRAINING or already powered down) in the set "nid[10-20]"
    from being powered down. Multiple sets of nodes can be specified
    with or without counts in a comma separated list (e.g
    "nid[10-20]:4,nid[80-90]:2"). By default no nodes are excluded. This
    value may be updated with scontrol. See
    ReconfigFlags=KeepPowerSaveSettings for setting persistence.

Brian Andrus

On 5/12/2023 2:35 AM, Xaver Stiensmeier wrote:
> Dear slurm-users,
>
> I am currently looking into options how I can deactivate suspending for
> nodes. I am both interested in the general case:
>
> Allowing all nodes to be powered up, but for all nodes without automatic
> suspending except when triggering power down manually.
>
> And the special case:
>
> Allowing all nodes to be powered up, but without automatic suspending
> for some nodes except when triggering power down manually.
>
> ---
>
> I tried using negative times for SuspendTime, but that didn't seem to
> work as no nodes are powered up then.
>
> Best regards,
> Xaver Stiensmeier
>
>
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