From owner-freebsd-current Wed Dec 15 9:35:20 1999 Delivered-To: freebsd-current@freebsd.org Received: from duke.cs.duke.edu (duke.cs.duke.edu [152.3.140.1]) by hub.freebsd.org (Postfix) with ESMTP id 65F641552E for ; Wed, 15 Dec 1999 09:35:17 -0800 (PST) (envelope-from gallatin@cs.duke.edu) Received: from grasshopper.cs.duke.edu (grasshopper.cs.duke.edu [152.3.145.30]) by duke.cs.duke.edu (8.9.1/8.9.1) with ESMTP id MAA28819; Wed, 15 Dec 1999 12:35:15 -0500 (EST) Received: (from gallatin@localhost) by grasshopper.cs.duke.edu (8.9.3/8.9.1) id MAA18905; Wed, 15 Dec 1999 12:34:45 -0500 (EST) (envelope-from gallatin@cs.duke.edu) From: Andrew Gallatin MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Date: Wed, 15 Dec 1999 12:34:45 -0500 (EST) To: Matthew Dillon Cc: freebsd-current@FreeBSD.ORG Subject: Re: Serious server-side NFS problem In-Reply-To: <199912151711.JAA32205@apollo.backplane.com> References: <14423.46117.353932.473968@grasshopper.cs.duke.edu> <199912151711.JAA32205@apollo.backplane.com> X-Mailer: VM 6.43 under 20.4 "Emerald" XEmacs Lucid Message-ID: <14423.52876.91488.48428@grasshopper.cs.duke.edu> Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Matthew Dillon writes: > This is very odd. Does it lockup with UDP or only with TCP? And only > with a solaris client? This appears to be solaris only. I just tried a UDP mount & I see the same problem. Is there anything else I can do? <...> > : > :- UDP NFS write performance from a FreeBSD client: > > Ok, I'll take a look at it. I get 9 MBytes/sec writing over UDP links > but only with fast (400MHz class) clients. With a 200 MHz class client > I am only getting 4-5 MBytes/sec. Frankly, I should be getting 9 MB/sec > even with the slower client! The client and server here are both 450MHz machines. The server and client are identical (450MHz PII (or PIII), etherexpress pro nics) except that the server has 384MB of ram and the client has 64MB. The client was running a kernel from last week. My desktop (196 MB 300MHZ PII) shows similar behaviour -- a drop from 7MB/s to 3MB/s. It is running a kernel from Monday. <...> > Yes, read performance has been improved in just the last few days > simply by adding a read heuristic to the server side for transfers off > the physical media. Nice! Thanks, Drew ------------------------------------------------------------------------------ Andrew Gallatin, Sr Systems Programmer http://www.cs.duke.edu/~gallatin Duke University Email: gallatin@cs.duke.edu Department of Computer Science Phone: (919) 660-6590 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message