Difference between revisions of "SLURM Interactive"
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== Graphical Jobs == | == Graphical Jobs == | ||
The same rules apply for graphical jobs. Your X11 connection will be automatically forwarded from the remote compute node so that your application will appear on your desktop. We highly recommend using the [[CIRCE Desktop|CIRCE Desktop Environment]] if you plan to utilize any graphical applications on the cluster. | The same rules apply for graphical jobs. Your X11 connection will be automatically forwarded from the remote compute node so that your application will appear on your desktop. We highly recommend using the [[CIRCE-SC Desktop|CIRCE-SC Desktop Environment]] if you plan to utilize any graphical applications on the cluster. | ||
Revision as of 20:24, 20 February 2017
Interactive Jobs
The SLURM system on CIRCE/SC allows users to run applications on available compute nodes while in a full shell session. This allows users to run applications that require direct user input and full graphical applications that require more extensive compute resources.
Interactive jobs can be run within a scheduled shell using the srun command. You’ll want to see the User’s Guide for more information about these options. Here is an example:
[user@login0 ~]$ srun —pty /bin/bash [user@svc-3024-6-25 ~]$
You can now run any compute-intensive task interactively.
Let us say that you require a minimum of 4GB of RAM for your interactive task. We can ask the scheduler to put us on a node with >4GB of RAM by requesting the mem constraint like so:
[user@login0 ~]$ srun --mem=4096 --pty /bin/bash
[user@svc-3024-6-25 ~]$ free
total used free shared buffers cached
Mem: 16396468 8315580 8080888 0 246772 3247420
-/+ buffers/cache: 4821388 11575080
Swap: 18612216 0 18612216
You can specify a wide variety of complexes. See Using Features
Please note: Unless the “—time=HH:MM:SS” constraint is used, all jobs submitted to SLURM (interactive or batch) will receive the default runtime of 1 hour!
Graphical Jobs
The same rules apply for graphical jobs. Your X11 connection will be automatically forwarded from the remote compute node so that your application will appear on your desktop. We highly recommend using the CIRCE-SC Desktop Environment if you plan to utilize any graphical applications on the cluster.