Frequently asked questions (FAQs)

General questions

• How can I contact user support?
  • What information should I provide when contacting user support?
• How do I acknowledge the VSC in publications?
• What are standard terms used in HPC?

Access to the infrastructure

• I messed up my authentication keys, what can I do?
• Where can I store what kind of data?
• How much disk space am I using?

Running jobs

• Why doesn’t my job start?
• My jobs seem to run, but I don’t see any output or errors?
• How can I run many similar computations conveniently?
• Can I run workflows on an HPC cluster?

Software

• How do I run applications in parallel?
  • What is parallelism anyway?
  • How can I vectorize my code?
  • How can I run my application with multiple threads?
  • Can I run my application on multiple compute nodes?
• Can I run containers on the HPC systems?
  • When should I use containers?
  • How can I create a Singularity image?
  • How can I run a Singularity image?
  • Can I use singularity images in a job?
  • Can I run parallel applications using a Singularity image?
  • Can I run a service from a Singularity image?