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Date:      Thu, 13 Dec 2001 12:03:16 -0500 (EST)
From:      Mike Silbersack <silby@silby.com>
To:        Dan Nelson <dnelson@allantgroup.com>
Cc:        Matthew Dillon <dillon@apollo.backplane.com>, Geoff Mohler <gemohler@www.speedtoys.com>, <hackers@FreeBSD.ORG>
Subject:   Re: NFS: How to make FreeBSD fall on its face in one easy step
Message-ID:  <Pine.BSF.4.30.0112131148410.29919-100000@niwun.pair.com>
In-Reply-To: <20011213153035.GB56448@dan.emsphone.com>

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On Thu, 13 Dec 2001, Dan Nelson wrote:

> In the last episode (Dec 13), Mike Silbersack said:
> > And if you hadn't heard, Matt just fixed a couple of bugs in the tcp
> > stack which improves NFS greatly.  It sounds like after this round of
> > NFS fixes, the first answer to NFS questions should be: Upgrade to
> > 4.5!
>
> I don't even bother with TCP mounts; my default amd rule says
> proto=udp.  Is there any reason to add the overhead of the TCP stack if
> you're not leaving your own ethernet?
>
> You should be able to easily saturate a 100mbit link with FreeBSD 4.*
> machines, and I can do 15-20MB/sec with Netgear GA620 gigabit nics (SMP
> 2 x pIII/600).
>
> --
> 	Dan Nelson
> 	dnelson@allantgroup.com

I'm not a NFS user, so I can't comment on how NFS is normally used... but
my guess would be that while UDP may be faster when you're benchmarking
two computers, it'll cause a lot more congestion when you have 200
computers.

Mike "Silby" Silbersack




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