[slurm-users] changes in slurm.

Sarlo, Jeffrey S JSarlo at Central.UH.EDU
Fri Jul 10 11:46:02 UTC 2020

If you run  slurmd -C  on the compute node, it should tell you what slurm thinks the RealMemory number is.


From: slurm-users <slurm-users-bounces at lists.schedmd.com> on behalf of navin srivastava <navin.altair at gmail.com>
Sent: Friday, July 10, 2020 6:24 AM
To: Slurm User Community List <slurm-users at lists.schedmd.com>
Subject: Re: [slurm-users] changes in slurm.

Thank you for the answers.

is the RealMemory will be decided on the Total Memory value or total usable memory value.

i mean if a node having 256GB RAM but free -g will tell about only 251 GB.
deda1x1591:~ # free -g
             total       used       free     shared    buffers     cached
Mem:           251         67        184          6          0         47

so we can add the value is 251*1024 MB  or 256*1024MB.  or is there any slurm command which will provide me the value to add.


On Thu, Jul 9, 2020 at 8:01 PM Brian Andrus <toomuchit at gmail.com<mailto:toomuchit at gmail.com>> wrote:

1. you will need to restart slurmctld when you make changes to the
physical definition of a node. This can be done without affecting
running jobs.

2. You can have a node in more than one partition. That will not hurt
anything. Jobs are allocated to nodes, not partitions, the partition is
used to determine which node(s) and filter/order jobs. You should add
the node to the new partition, but also leave it in the 'test'
partition. If you are looking to remove the 'test' partition, set it to
down and once all the running jobs that are in it finish, then remove it.

Brian Andrus

On 7/8/2020 10:57 PM, navin srivastava wrote:
> Hi Team,
> i have 2 small query.because of the lack of testing environment i am
> unable to test the scenario. working on to set up a test environment.
> 1. In my environment i am unable to pass #SBATCH --mem-2GB option.
> i found the reason is because there is no RealMemory entry in the node
> definition of the slurm.
> NodeName=Node[1-12] NodeHostname=deda1x[1450-1461] NodeAddr=Node[1-12]
> Sockets=2 CoresPerSocket=10 State=UNKNOWN
> if i add the RealMemory it should be able to pick. So my query here
> is, is it possible to add RealMemory in the definition anytime while
> the jobs are in progres and execute the scontrol reconfigure and
> reload the daemon on client node?  or do we need to take a
> downtime?(which i don't think so)
> 2. Also I would like to know what will happen if some jobs are running
> in a partition(say test) and I will move the associated node to some
> other partition(say normal) without draining the node.or if i suspend
> the job and then change the node partition and will resume the job. I
> am not deleting the partition here.
> Regards
> Navin.

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