From owner-freebsd-isp Wed Sep 15 18: 0: 3 1999 Delivered-To: freebsd-isp@freebsd.org Received: from drip.puddle.net (cx288885-b.okcs1.ok.home.com [24.4.98.148]) by hub.freebsd.org (Postfix) with ESMTP id 63E821515F for ; Wed, 15 Sep 1999 17:59:59 -0700 (PDT) (envelope-from river@theriver.nu) Received: by cx288885-b.okcs1.ok.home.com with Internet Mail Service (5.5.2232.9) id ; Wed, 15 Sep 1999 20:04:34 -0500 Message-ID: <21DC5E98AE1FD311B1290020AFDB6C6E63D8@cx288885-b.okcs1.ok.home.com> From: river To: freebsd-isp@freebsd.org Subject: RE: SMTP load balancing Date: Wed, 15 Sep 1999 20:04:28 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2232.9) Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Why not setup the MX record to point at mail.yourhost.com and then have mail with the 4 machines ip's in round robin style (4 A Records if I remebmer correctly). These 4 machines can deliver mail to = the pop3 server on the backend that all your users connect to. Yes all the users will still connect to the same machine for pop3, but the sending = and recieving of mail is processed by the 4 BSD machines. -----Original Message----- From: Fernando Schapachnik [mailto:fpscha@ns1.sminter.com.ar] Sent: Wednesday, September 15, 1999 8:38 AM To: freebsd-isp@freebsd.org Subject: SMTP load balancing Hello: I've a situation on which I need some help. We're running a busy=20 mail server, now on a Sun. As vertical scalability is very expensive = I'm=20 considering building an -individually inexpensive- FreeBSD cluster. What I'm certain about is that I don't what to use NFS, because of all the problem it generates (locking, etc.).=20 I thought about building something like: +-----------+ +----- Server 1 | Front end | | | DNS MX |--------+----- Server 2 +-----------+ | +----- Server ... | +----- Server n The idea is that there is one machine pointed by the MX record=20 that receives incoming mail and distributes it between the other = servers.=20 Some problems arise: a) The front end still has to manage the huge amount of incoming mail. b) Uniform POP3 access to mailboxes under the same name becomes = imposible. Another posibility would be to have something like +-------------+ +-------------+ +---------------+ +-------------+ | Front end 1 | | Front end 2 | | Front end ... | | Front end n | +-------------+ +-------------+ +---------------+ +-------------+ | | | | +---------------+---------+---------+-----------------+ | +------------+ | Disk array | +------------+ But... such a thing exists? I mean: an external disk array that=20 can be mounted by several FreeBSD machines at the same time. I think = not.=20 May be replacing the disk array by another machine, which has the file=20 repository and is the POP3 server? I would really aprettiate any comment or suggestion. Thanks for your time! Fernando P. Schapachnik Administraci=F3n de la red VIA Net Works Argentina SA Diagonal Roque S=E1enz Pe=F1a 971, 4=BA y 5=BA piso. 1035 - Capital Federal, Argentina.=20 (54-11) 4323-3333 http://www.via-net-works.net.ar To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message