From owner-freebsd-hackers Thu Dec 13 10:48:35 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from apollo.backplane.com (apollo.backplane.com [216.240.41.2]) by hub.freebsd.org (Postfix) with ESMTP id 0CA8437B41A for ; Thu, 13 Dec 2001 10:48:31 -0800 (PST) Received: (from dillon@localhost) by apollo.backplane.com (8.11.6/8.9.1) id fBDImUZ70224; Thu, 13 Dec 2001 10:48:30 -0800 (PST) (envelope-from dillon) Date: Thu, 13 Dec 2001 10:48:30 -0800 (PST) From: Matthew Dillon Message-Id: <200112131848.fBDImUZ70224@apollo.backplane.com> To: Dan Nelson Cc: Mike Silbersack , Geoff Mohler , hackers@FreeBSD.ORG Subject: Re: NFS: How to make FreeBSD fall on its face in one easy step References: <200112130659.fBD6xZt55360@apollo.backplane.com> <20011213153035.GB56448@dan.emsphone.com> Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG :> 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 think there's a trade-off. TCP mounts deal with heavy parallel client loads better then UDP because they do real congestion and streaming control whereas NFS's UDP implementation fakes it. A UDP mount will work better for a large parallel load from a single client. I tend to use both types of mounts but I personally prefer TCP mounts over UDP because they are more secure and easier to get through a firewall. -Matt Matthew Dillon To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message