From owner-freebsd-stable Fri Apr 6 10: 1:57 2001 Delivered-To: freebsd-stable@freebsd.org Received: from point.osg.gov.bc.ca (point.osg.gov.bc.ca [142.32.102.44]) by hub.freebsd.org (Postfix) with ESMTP id 0F28D37B43C for ; Fri, 6 Apr 2001 10:01:54 -0700 (PDT) (envelope-from Cy.Schubert@uumail.gov.bc.ca) Received: (from daemon@localhost) by point.osg.gov.bc.ca (8.8.7/8.8.8) id KAA16698; Fri, 6 Apr 2001 10:01:53 -0700 Received: from passer.osg.gov.bc.ca(142.32.110.29) via SMTP by point.osg.gov.bc.ca, id smtpda16695; Fri Apr 6 10:01:46 2001 Received: (from uucp@localhost) by passer.osg.gov.bc.ca (8.11.2/8.9.1) id f36H1fB63336; Fri, 6 Apr 2001 10:01:41 -0700 (PDT) Message-Id: <200104061701.f36H1fB63336@passer.osg.gov.bc.ca> Received: from localhost.osg.gov.bc.ca(127.0.0.1), claiming to be "passer.osg.gov.bc.ca" via SMTP by localhost.osg.gov.bc.ca, id smtpdc63332; Fri Apr 6 10:00:51 2001 X-Mailer: exmh version 2.3.1 01/18/2001 with nmh-1.0.4 Reply-To: Cy Schubert - ITSD Open Systems Group X-Sender: cyschubert To: Chris Dillon Cc: Cy Schubert - ITSD Open Systems Group , freebsd-stable@FreeBSD.ORG Subject: Re: TCP New Reno algorithm In-reply-to: Your message of "Fri, 06 Apr 2001 11:39:36 CDT." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Fri, 06 Apr 2001 10:00:50 -0700 From: Cy Schubert Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG In message , Ch ris Dillon writes: > On Thu, 5 Apr 2001, Cy Schubert - ITSD Open Systems Group wrote: > > > Since upgrading some of our FreeBSD systems to the latest -stable, > > we've noticed that our Veritas backup throughput from the upgraded > > FreeBSD clients to our Veritas server, a Sun 450, had dropped to > > about 3 packets per second. Disabling the TCP New Reno algorithm > > (sysctl -w net.inet.tcp.newreno=0) returned our Veritas backup > > throughput to about 70 packets per second. > > I just did a quick test with Veritas NetBackup BusinesServer 3.4 > running on NT4 and FreeBSD 3.4-RC using the native FreeBSD NetBackup > client. For a particular backup set (about 450MB), with New Reno > enabled I get 3404.282KB/sec, and without New Reno I get > 3192.508KB/sec. This is a backup to a local disk on the NT4 box, not > tape, so tape throughput isn't a limiting factor. Turning off New > Reno actually hurt throughput just a little bit. The client and > server aren't on the same 100MBit Ethernet network, they're separated > by another FreeBSD 3.4-RC (New Reno enabled) box acting as a router. > Maybe you're seeing a bad New Reno interaction with Solaris itself? I might be seeing that. I'll be sending some tcpdump output to Jonathan early next week. I'm in the middle of a major Sun T3 problem. Until that is solved, my customer comes first. Regards, Phone: (250)387-8437 Cy Schubert Fax: (250)387-5766 Team Leader, Sun/Alpha Team Internet: Cy.Schubert@osg.gov.bc.ca Open Systems Group, ITSD, ISTA Province of BC To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message