Date: Thu, 26 Jul 2001 08:53:04 +0200 (CEST) From: =?iso-8859-1?q?Fabrizio=20Ravazzini?= <freefabri@yahoo.it> To: Sascha Lucky Luck <bofh@online.ie> Cc: freebsd-isp@freebsd.org Subject: Re: FreeBSD Mail Toaster CLUSTER Message-ID: <20010726065304.39908.qmail@web20106.mail.yahoo.com> In-Reply-To: <996071896.3b5ed9d8b73cd@mail.online.ie>
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Thanks a lot Sascha for the help, but how can I assign connections 'round robin' in the DNS, is there some documentation that can help me doing such thing? The DNS must be in my internal LAN? Sorry for stupid questions but is the first time I'm realizing a big mail server. Best regards Fabrizio --- Sascha Lucky Luck <bofh@online.ie> ha scritto: > Quoting Fabrizio Ravazzini <freefabri@yahoo.it>: > > > Is it possible with FreeBSD to make a "cluster" of > two > > machines (ix86) that when one goes down for some > fault > > the other takes care of the service so that Mail > is > > still available? > > Fabrizio, > > set up 2 mail servers and CNAME <mail.foo.bar> to > both servers in DNS. > The 2 servers must access a file system (on a 3rd > machine or a shared > RAID system, or a Netapp filer) where the mails are > stored. > Be sure to use qmail with Maildir, otherwise you'll > have file locking > issues. > DNS will assign a connection to <mail.foo.bar> to > one or the other > server using 'round robin'. If one server is down, > an incoming > connection will have a 50% chance of failure (the > more servers, the > more likely a successful connection becomes) but on > retry it should > connect. > > This setup has been successfully used with approx > 100,000 users and 4 > mail servers. > > Alternatively you can use a load balancer instead of > DNS. It will > notice a server down and reroute connections to the > survivor. > > Good luck, > > s. > > ---------------------------------------------------- > Get your free email account at http://www.online.ie/ ______________________________________________________________________ Do You Yahoo!? Il tuo indirizzo gratis e per sempre @yahoo.it su http://mail.yahoo.it To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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