Re: [Condor-users] Condor Simulation Tool

[Ian Stokes-Rees <ijstokes@xxxxxxxxxxxxxxxxxxx>]

On Tue Aug  2 09:50:30 2011, Ian Chesal wrote:
> I think the problem with writing a simulator is you'll be writing 
> Condor.

This isn't entirely true.  It is possible to abstract the key parts of 
the system and to model scheduling overheads, in-job messaging, file 
transfer, etc.  But the more "realism" you want, the more work it is.  
Certainly the biggest challenge is that Condor is "internally modular" 
(at least that is my take on it), but you aren't going to have a lot of 
luck trying to run a matchmaker (the key part it sounds like you want 
to test) in a standalone mode to simulate scheduling decisions.

If this is something you really want to pursue, I'd recommend simgrid:

http://simgrid.gforge.inria.fr/

Expect several days of effort to get something vaguely condor-like set 
up.

Don't confuse "simgrid" with "gridsim" -- two different projects.  I 
only have experience with the former.  The latter is from a well 
respected group as well, and has been in active development for many 
years, but I can't speak to its suitability for what I think you're 
trying to achieve in simulating Condor.

Ian