Date: Thu, 26 Jan 2012 00:22:08 -0800 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: Rick Macklem <rmacklem@uoguelph.ca> Cc: freebsd-fs@freebsd.org Subject: Re: Is doing mount -u -o udp useful for you on an NFS mount? Message-ID: <20120126082208.GA49394@icarus.home.lan> In-Reply-To: <1280581135.166316.1327550501697.JavaMail.root@erie.cs.uoguelph.ca> References: <1280581135.166316.1327550501697.JavaMail.root@erie.cs.uoguelph.ca>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, Jan 25, 2012 at 11:01:41PM -0500, Rick Macklem wrote: > Using a "mount -u" to change from TCP to UDP for an > NFS mount is somewhat broken for both NFS clients. > To make it work correctly is not trivial. > > As such, I'd like to find out if anyone needs this > capability? (Note, I am not talking about UDP mounts > in general, just the case of switching a TCP mount to > a UDP mount without doing an unmount/mount.) I've never seen any SAN admin do this, even on our production server at work (Solaris with a NetApp SAN). When it comes to NFS, the moral of the story is always "reboot the machine" (which is good anyway, make sure everything comes up on boot, else months from now you'll find out the hard way). However, to squelch people from doing it, could mount_nfs(8) actually be modified to spit out a nastygram when someone attempts to do this, so at least the admin would know that such isn't supported due to the extreme complexities involved? -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, US | | Making life hard for others since 1977. PGP 4BD6C0CB |
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20120126082208.GA49394>