[KLUG Members] Limiting user's CPU and resource usage

[greenproc]

Adam bultman wrote:
> I've been tasked with trying to figure out how to limit the amount of
> resources that a user is allowed to consume on a given linux server. 
> 
> Please note, this isn't a hard ceiling of 'how much CPU time can a
> person use', or 'how much RAM can a person use', so using the stuff in
> pam_limits or /etc/security/limits won't work. What I need to do is let
> all users (in some cases, 120+) use the server without 'hogging' the
> CPUs (I'd LOVE to limit disk accesses in blocks per second,too!).  So,
> user 'adam' can use  up to 80% , while user 'developerguy' is allowed to
> use 14%, because he often writes bad code that hogs the cpu. User 'root'
> has free reign,  and 'scriptrunner' is relegated to 7%, because he's a
> jerk and runs CPU-intensive programs during the day, affecting everybody
> else.
> 
> I've done a bunch of googling, and I've found kernel patches and the
> like, but none of them are for newer (> 2.4.14 or =~2.6) kernels. Most
> of them are for 2.2.x and earlier 2.4 kernels, which one won't find on a
> newer (Centos or Fedora) system.  I DO have a few RH6.2 and RH7.3
> systems, but those are best left alone, kernel wise, if you ask me.
> 
> So, at this point, I have no options - or usable options - that I can
> find (and no, installing BSD is not an option.)  Are there userland
> programs, or other daemons I can run that  will throttle users, or at
> least change the scheduler (obviously requiring a patched kernel) that
> is stable that will do what I need here? It'd seem odd if it didn't
> exist yet.

Is renicing processes an option, or not robust enough to handle your
situation?

> 
> Adam
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