Singularity for Satorians

Fast start

  • Pull your image

export SINGULARITY_DOCKER_ARCHITECTURE=ppc64le
singularity pull docker://centos:7

  • Get an allocation, for example:

srun --gres=gpu:4 -N 1 --mem=1T --time 1:00:00 -l --pty /bin/bash

  • Submit your payload

singularity exec centos_7.sif ls /

Other notes

  • Pull your image

  • If you are using an existing image, confirm that arch is ppc64le

Interactive Allocation:

  • Get an allocation (for interactive allocation):

  • Consider the size of your workload, do you need CPU? memory? GPU?

  • These are all specified in the bsub request, here is a good [1]

  • For example, here is a bsub to request allocation for 4 GPUS, via the normal queue, launching an interactive session using bash as terminal

srun --gres=gpu:4 -N 1 --mem=1T --time 1:00:00 -l --pty /bin/bash

  • Submit your payload

  • Using interactive allocation, we are allocated a node - your interactions with singularity will be generally standard , just like you would in any environments

  • Remember you do not have sudo access on this cluster, this might impact your workflow

singularity exec centos_7.sif ls /

Non interactive / batch mode

  • Workflow is similar to interactive allocation, however we need to create an application profile prior to submitting the workload

  • This mode might be better for headless / non-interactive workloads as the resources can be more easily allocated to the workload

  • Create an application profile [2]

  • For example

Begin Application
NAME = singapp
CONTAINER = singularity[image(centos_7.sif)]
DESCRIPTION = Singularity User Service
End Application

  • Submit the workload via the application profile [3]

  • For example

sbatch singapp ./myjob.sh