linux-kernel - Re: Group limit for NFS exported file systems

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Date:	Wed, 23 Aug 2006 04:35:59 -0700
From:	"Ray Lee" <madrabbit@...il.com>
To:	"Robert Szentmihalyi" <robert.szentmihalyi@....de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Group limit for NFS exported file systems

On 8/23/06, Robert Szentmihalyi <robert.szentmihalyi@....de> wrote:
> > Is he a member of more than 16 groups?
>
> Yes. He is actually a member of 27 groups.
> Is the limit of 16 groups still current? I was under the impression that it is a limitation of 2.4 kernels....

Under 2.6 local group membership was expanded to 65536. NFS, however,
is a standard separate from Linux, and it imposes a limit of 16 groups
on the wire for the AUTH_UNIX credentials.

If all your client systems are Linux, you can use the patch at:
    http://www.frankvm.com/nfs-ngroups/
as a work around. (Only the client systems need the patch.)

I haven't used it myself, so best of luck.

Ray
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