Bug #4562

Updated by Tom Clegg over 5 years ago

These general approaches need to be introduced and explained between http://doc.arvados.org/user/tutorials/intro-crunch.html and http://doc.arvados.org/user/tutorials/running-external-program.html.

Executive summary
* run-command makes sense when you already have a command line tool installed in a docker image, and you just want to invoke it as part of a compute workflow/pipeline
* writing your own crunch script makes sense if you want your code to be in revision control, you want more control of concurrency patterns, you need better performance, or you'd just rather write everything in python.
* third option (use run-command to wrap something that lives in your own git tree) isn't very well supported but as a workaround you could copy the run-command stuff into your own git tree.