number of users in a group 2005-12-20 - By Chris Adams
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Once upon a time, Chris Adams <cmadams@(protected)> said:
> Once upon a time, Bowen, III, Clint <cbowen@(protected)> said:
> > I'm currently using RHEL 3, and I have a problem in that my
> > groups will only hold 32 members. While this works fine for
> > departmental use, making groups for some classes is problematic. Does
> > RHEL 4 increase this limit, and if so to what number? What is the
> > recommended workaround for this problem?
>
> This is a classic Unix problem because pretty much all Unix systems use
> a static array for the auxilliary group membership. IIRC the Cobalt/Sun
> kernel patch for the dynamic group list went in before RHEL 4 picked the
> kernel version, so it should support up to 65536. See the output of:
>
> echo -e '#include <limits.h>\nNGROUPS_MAX' | cpp | tail -1
I realized just as I sent this that you meant the reverse of what I was
talking about (number of users in a group, not number of groups a user
is in). Sorry, I don't know about changing that limit; it is typically
based on the line length of the /etc/group entry though, so using LDAP
instead of plain text files may get around it.
--
Chris Adams <cmadams@(protected)>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.
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