Partitions are used on Crane and Swan to distinguish different
resources. You can view the partitions with the command
To run short jobs for testing and development work, a job can specify a different quality of service (QoS). The short QoS increases a jobs priority so it will run as soon as possible.
Overall limitations of maximum job wall time. CPUs, etc. are set for all jobs with the default setting (when thea “–qos=” section is omitted) and “short” jobs (described as above) on Crane and Swan. The limitations are shown in the following form.
|SLURM Specification||Max Job Run Time||Max CPUs per User||Max Jobs per User|
|Default||Leave blank||7 days||2000||1000|
|Short||#SBATCH –qos=short||6 hours||16||2|
Please also note that the memory and local hard drive limits are subject to the physical limitations of the nodes, described in the resources capabilities section of the HCC Documentation and the partition sections above.
Partitions marked as owned by a group means only specific groups are allowed to submit jobs to that partition. Groups are manually added to the list allowed to submit jobs to the partition. If you are unable to submit jobs to a partition, and you feel that you should be, please contact email@example.com.
To submit jobs to an owned partition, use the SLURM
--partition option. Jobs
can either be submitted only to an owned partition, or to both the owned
partition and the general access queue. For example, assuming a partition
Submitting solely to an owned partition means jobs will start immediately until the resources on the partition are full, then queue until prior jobs finish and resources become available.
Submitting to both an owned partition and
batch means jobs will run on both the owned
partition and the general batch queue. Jobs will start immediately until the resources
on the partition are full, then queue. Pending jobs will then start either on the owned partition
or in the general queue, wherever resources become available first
(taking into account FairShare). Unless there are specific reasons to limit jobs
to owned resources, this method is recommended to maximize job throughput.
guest partition can be used by users and groups that do not own
dedicated resources on Crane or Swan. Jobs running in the
will run on the owned resources with Intel OPA interconnect. The jobs
are preempted when the resources are needed by the resource owners and
are restarted on another node.
We have put Anvil nodes which are not running Openstack in this partition. They have Intel Xeon E5-2650 v3 2.30GHz 2 CPU/20 cores and 256GB memory per node. However, they don’t have Infiniband or OPA interconnect. They are suitable for serial or single node parallel jobs. The nodes in this partition are subjected to be drained and move to our Openstack cloud when more cloud resources are needed without notice in advance.
Crane nodes use either Infiniband or Intel Omni-Path interconnects in the batch partition. Most users don’t need to worry about which one to choose. Jobs will automatically be scheduled for either of them by the scheduler. However, if the user wants to use one of the interconnects exclusively, the SLURM constraint keyword is available. Here are the examples: