If you wish to run interactively but are constrained by the limits on the CPUs, CPU Time or memory, you may run a small interactive job requesting the resources you want.
By doing that, you will get a dedicated allocation of CPUs and memory to run your application interactively. There are several ways to do this, depending on your use case:
If you have a single script or a command you wish to run interactively, one way to do this through the batch system is with a direct call to srun from within session in the login node. It would feel as if you were running locally, but it is instead using a job with dedicated resources:
$ cat myscript.sh #!/bin/bash echo "This is my super script" echo "Doing some heavy work on $HOSTNAME..." $ ./myscript.sh This is my super script Doing some heavy work on at1-11... $ srun ./myscript.sh This is my super script Doing some heavy work on at1-105... |
In that example the submitted job would have run using the default settings (default qos, with just 1 cpu and default memory). You can of course pass additional options to srun to customise the resources allocated to this interactive job. For example, to run with 4 cpus, 12 GB with a limit of 6 hours:
$ srun -c 4 --mem=12G -t 06:00:00 ./myscript.sh |
Check man srun for a complete list of options.