From: Trond Myklebust <trond.myklebust@fys.uio.no>
Subject: Re: Status of mount.nfs
Date: Sun, 22 Jul 2007 17:58:13 -0400
Message-ID: <1185141493.6577.14.camel@localhost>
References: <20070708191640.GA13962@uio.no>
	<18065.43199.104020.412029@notabene.brown>
	<20070715083114.GB4158@uio.no>
	<18074.50730.591965.39211@notabene.brown>
	<20070716092047.GA10353@uio.no>
	<18075.17719.855332.259470@notabene.brown>
	<20070722191733.GA31501@uio.no>
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Cc: nfs@lists.sourceforge.net
To: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
In-Reply-To: <20070722191733.GA31501@uio.no>
Sender: nfs-bounces@lists.sourceforge.net
Errors-To: nfs-bounces@lists.sourceforge.net

On Sun, 2007-07-22 at 21:17 +0200, Steinar H. Gunderson wrote:
> On Mon, Jul 16, 2007 at 08:15:19PM +1000, Neil Brown wrote:
> > Hmmm.... That code looks a little odd.  If you say you want udp, it
> > will still probe for tcp first.  That doesn't hurt as UDP and TCP
> > always use the same port: 2049.  But it is still odd.  I wonder if it
> > is needed at all.
> 
> It seems it broke for a more normal situation as well:
> 
>   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=433881
> 
> Giving the "udp" option helped the user, though, but I don't really see why
> the behavior changed.
> 
> /* Steinar */

The default _had_ to change to TCP because UDP is just too unreliable
for NFS running with large (> 8k) r/w sizes, or on nonhomogeneous
networks (mixed 10/100/1000Gbit), or with fast clients.

Trond


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