Re: [slurm-users] Different Memory Nodes

[Daniel Letai]

Just a quick FYI - using gang mode preemption would mean the available memory would be lower, so if the preempting job requires the entire node memory, this will be an issue. On 9/4/19 8:51 PM, Tina Fora wrote: Thanks Brian! I'll take a look at weights. I want others to be able to use them and take advantage of the large memory when free. We have a preemptable partiton below that works great. PartitionName=scavenge AllowGroups=ALL AllowAccounts=ALL AllowQos=scavenge,abc AllocNodes=ALL Default=NO QoS=scavenge DefaultTime=NONE DisableRootJobs=NO ExclusiveUser=NO GraceTime=0 Hidden=NO MaxNodes=1 MaxTime=4-00:00:00 MinNodes=1 LLN=NO MaxCPUsPerNode=UNLIMITED Nodes=...a[01-05,11-15],b[01-10],c[01-20] PriorityJobFactor=10 PriorityTier=10 RootOnly=NO ReqResv=NO OverSubscribe=NO OverTimeLimit=NONE PreemptMode=GANG,SUSPEND ... (Added a subject) Tina, If you want group xxx to be the only ones to access them, you need to either put them in their own partition or add info to the node definitions to only allow certain users/groups. If you want them to be used last, so they are available until all the other nodes are in use, you can add weights to the node definitions. This would mean users could request >192GB memory, so it has to go to one of the updated nodes, which will only be taken if the other nodes are used up, or a job needing > 192GB is running on them. Brian Andrus On 9/4/2019 9:53 AM, Tina Fora wrote: Hi, I'm adding a bunch of memory on two of our nodes that are part of a blade chassis. So two computes will be upgraded to 1TB RAM and the rest have 192GB. All of the nodes belog to several partitons and can be used by our paid members given the partition below. I'm looking for ways to figure out how only group xxx (the ones paying for the memory upgrade) can get to them. PartitionName=member AllowGroups=ALL AllowAccounts=ALL AllowQos=xxx,yyy,zzz AllocNodes=ALL Default=NO QoS=N/A DefaultTime=NONE DisableRootJobs=NO ExclusiveUser=NO GraceTime=0 Hidden=NO MaxNodes=1 MaxTime=5-00:00:00 MinNodes=1 LLN=NO MaxCPUsPerNode=UNLIMITED Nodes=a[01-05,11-15],b[01-20] PriorityJobFactor=500 PriorityTier=500 RootOnly=NO ReqResv=NO OverSubscribe=NO OverTimeLimit=NONE PreemptMode=OFF State=UP ... Say compute a01 and a02 will have 1TB memory and I want group xxx to be able to get to them quickly using the partition above. Thanks, Tina