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Date: Tue, 22 Oct 2002 11:21:22 -0700
From: Tim Hockin <thockin@sun.com>
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To: Jesse Pollard <pollard@admin.navo.hpc.mil>
CC: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [BK PATCH 1/4] fix NGROUPS hard limit (resend)
References: <200210220036.g9M0aP831358@scl2.sfbay.sun.com> <1035308740.31873.107.camel@irongate.swansea.linux.org.uk> <3DB58CBD.3030207@sun.com> <200210221303.47488.pollard@admin.navo.hpc.mil>
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Jesse Pollard wrote:

> Does it actually work with NFS???? or any networked file system?
> Most of them limit ngroups to 16 to 32, and cannot send any data
> if there is an overflow, since that overflow would replace all of the
> data you try to send/recieve...

NFS has a smaller limit, that is correct.  An unfortunate limitation.

> And I really doubt that anybody has 10000 unique groups (or even
> close to that) running under any system. The center I'm at has
> some of the largest UNIX systems ever made, and there are only
> about 600 unique groups over the entire center. The largest number
> of groups a user can be in is 32. And nobody even comes close.

I'm glad it doesn't affect you.  If it was a more common problem, it 
would have been solved a long time ago.  It does affect some people, 
though.  Maybe they can redesign their group structures, but why not 
remove this arbitrary limit, since we can?

Tim

-- 
Tim Hockin
Systems Software Engineer
Sun Microsystems, Linux Kernel Engineering
thockin@sun.com

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