• You can do what you want on your local laptop/desktop (except get viruses)

• Be careful when you use remote servers shared with other users
  • Others should not even notice that you are there! Yes, you can use computing resources cleanly and efficiently…
  • If you have some heavy duty processing to do:
    • Use shared servers only for quick tests (with a subset your huge dataset)
      • notebook servers are shared servers!
    • Use dedicated batch/computing clusters for heavy processing
      • heavy = will run a long time and/or use a lot of CPU and/or use a lot of RAM and/or will do a lot of disk reading/writing, …
      • Resources you use in High Performance Centers will probably be deducted from a (shared) project

• When possible, avoid duplicating data and run your computations near the data
  • Disk space is also a resource! Do not forget to remove temporary data

• Ask your experienced colleagues when you are not sure about something (sometimes even if you are sure…)
  • There are no stupid questions (especially for beginners)
  • There are always different ways to do things, some are much less efficient than others

• Learn how to monitor resources usage: top, df, du, …

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