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From: davidc@vlsisj.VLSI.COM (David Chapman)
Newsgroups: comp.sources.wanted
Subject: Re: want UNIX resource management stuff
Message-ID: <15356@vlsisj.VLSI.COM>
Date: 12 Oct 89 00:53:00 GMT
References: <21014@uflorida.cis.ufl.EDU>
Reply-To: davidc@vlsisj.UUCP (David Chapman)
Distribution: usa
Organization: VLSI Technology Inc., San Jose, CA
Lines: 29

In article <21014@uflorida.cis.ufl.EDU> kcw@beach.cis.ufl.edu (Ken Whedbee) writes:
>I'm looking for some resource management programs that run
>on UNIX to enforce stuff like CPU time limits.  (for example,
>kick people off after they have used 15 CPU minutes ..)
>Also something that would be nice is renicing background
>user processes after they've run awhile at normal priority.
>
>I'm basically looking for BSD UNIX stuff to run on ULTRIX.
>VMS type people are gonna be using this system, and they
>want VMS type of resource enforcements such as CPU time limits
>and other very mysterious services ...

Last I heard this wasn't easy.  Under VMS, programs are overlaid onto
the same process.  As a result it is easy to accumulate CPU time.  Under
UNIX everything runs as a new process and so it's easy to "lose" CPU time
(renice for a single process should be possible, though).

UNIX was not designed to have resource controls.  This is admittedly one
of the major holes WRT a commercial environment (i.e. possibly selfish
users).  There are well-known examples of programs that anyone can run
and crash a UNIX machine (though they'll know who did it).  You might
have trouble finding what you need.

With any luck, I'm wrong.  For your sake I hope so.
-- 
		David Chapman

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