From: "Ogden, Aaron A." <aogden@unocal.com>
Subject: ~800 mountpoint limitation
Date: Tue, 14 Oct 2003 10:51:04 -0500
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Message: 1
Date: Mon, 13 Oct 2003 11:23:51 +0800 (WST)
From: Ian Kent <raven@themaw.net>
To: "Ogden, Aaron A." <aogden@unocal.com>
cc: Mike Waychison <Michael.Waychison@Sun.COM>,
   autofs mailing list <autofs@linux.kernel.org>,
<nfs@lists.sourceforge.net>
Subject: Re: [NFS] RE: [autofs] multiple servers per automount

> On Fri, 10 Oct 2003, Ogden, Aaron A. wrote:
>=20
> >
> >
> > > So this would indicate that even if there is a device system that
can
> > > increase the number of unnamed devices that subsystems like NFS
cannot
> > > handle this many mounts.
> >
> > Maybe.  I'm not 100% certain though.  Currently I am holding steady
at
> > 710 active mounts, I am going to write a little script to mount more
in
> > small increments, ie. read a list of ~1000 mountpoints from /home,
mount
> > a few of them, check the filesystems, and repeat... this way I will
know
> > exactly where things break down.
>
> Interesting.
>=20
> If you can edge it up then it's probably not an available port
> restriction.
>=20
> There may be more than one issue at work here.

Hello all,
This limitation has been confirmed to my satisfaction, I just had a test
machine crack at 799 mountpoints, so it seems that Chuck's RPC theory
may be correct.  Mike Waychison and Eric Werme mentioned that Solaris
and HPUX use a multiplexed scheme to reduce the number of ports required
for NFS clients, perhaps that is the direction linux NFS/RPC should be
heading.

--aaron


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