Re: Max NFS mounts for a FreeBSD client?

From: Robert Watson <rwatson@xxxxxxxxxxx>
Date: Fri, 20 Jul 2007 18:07:37 +0100 (BST)

On Fri, 20 Jul 2007, Eric L. Anderson wrote:

What is the limit of NFS mounts a FreeBSD server can make and how do you modify this limit?

The only reference I could find to this question on the FreeBSD lists is http://lists.freebsd.org/pipermail/freebsd-questions/2004-July/051947.html

I have ran a similar test and the same thing happens after 420 NFS mounts. This is on both FreeBSD 6.0 and 6.2.

We have recently run into a problem where we are bumping up against some kind of limit to the number of NFS mounts on our FreeBSD servers.

Sounds a bit like something is running out of reserved ports to use -- the credentials error may mean that a port number >1023 was used for an NFS connection. Given that reserved ports start around 600, 420 is about the right number of sockets to reach 1024.

Robert N M Watson
Computer Laboratory
University of Cambridge
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