From owner-freebsd-questions@FreeBSD.ORG Tue Feb 14 21:31:24 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9521D16A423 for ; Tue, 14 Feb 2006 21:31:24 +0000 (GMT) (envelope-from lists@stringsutils.com) Received: from zoraida.natserv.net (p65-147.acedsl.com [66.114.65.147]) by mx1.FreeBSD.org (Postfix) with ESMTP id 01B5343D48 for ; Tue, 14 Feb 2006 21:31:23 +0000 (GMT) (envelope-from lists@stringsutils.com) Received: from 35st-server.simplicato.com (static-71-249-233-130.nycmny.east.verizon.net [71.249.233.130]) by zoraida.natserv.net (Postfix) with ESMTP id A0A627D90; Tue, 14 Feb 2006 16:31:22 -0500 (EST) References: <20060207222202.GA8604@math.jussieu.fr> <43E9B39B.2070507@locolomo.org> <20060208170851.GA90120@alexis.mi.celestial.com> Message-ID: X-Mailer: http://www.courier-mta.org/cone/ From: Francisco Reyes To: freebsd@celestial.com Date: Tue, 14 Feb 2006 16:33:50 -0500 Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset="US-ASCII" Content-Disposition: inline Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: Large imap server. X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Feb 2006 21:31:24 -0000 X-List-Received-Date: Tue, 14 Feb 2006 21:31:24 -0000 Bill Campbell writes: > Cyrus scaling? We currently user Courier and so far I am far from impressed with it's scalability. We have NFS servers for the storage and then front end machines for the POP/IMAP connections. The footprint per connection is about 3MB to 5MB on the client. On a machine with 2GB that means about 600 connections... but the machines usually are dying around 400 connections. > Perhaps on one mongo server. I have read totally the opposity that the only way to scale a mail setup beyond 10s of thousands is with Cyrus .. or some other propietary system. Have note read of any truly large Courier installation. > imap from a central server housing home directories, and have > seen essentially linear performance as servers are added. How many connections can you handle per "front-end" machine? What type of configuration? I inheritted the setup I am working with and little by little we are building things "right".. including better mail store machines. Also as part of the initial question was which sysctl/kernel settings are usefull in dedicated mail clients/servers