Date: Tue, 14 Feb 2006 16:33:50 -0500 From: Francisco Reyes <lists@stringsutils.com> To: freebsd@celestial.com Cc: freebsd-questions@freebsd.org Subject: Re: Large imap server. Message-ID: <cone.1139952830.347647.4979.5001@35st-server.simplicato.com> References: <20060207222202.GA8604@math.jussieu.fr> <43E9B39B.2070507@locolomo.org> <20060208170851.GA90120@alexis.mi.celestial.com>
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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
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