Large cyrus install surver

Simon Matter simon.matter at
Wed Dec 3 09:15:13 EST 2003

> Zitat von sjh at
>> Hi,
>> I'm looking at setting up IMAP servers for a mid-sized (2,000-3,000)
>> company with several sites around the world.  I've run Cyrus myself
>> for years, and I'm very happy with it.   But, I'd like to collect
>> some
>> configurations from people with large scale installations (CMU does
>> not count :).
> Ok here it goes...
>> The version(s) of Cyrus you are running
> Cyrus IMAP 2.1.12
>> The specs of the servers you have (cpu,mem,disk,os, etc)
> Dual-Xeon 2,8 GHz, 4GB RAM, 1 TB FiberChannel RAID/SAN, 2 FC-Cards
> (QLOGIC 2300)
> OS: Linux 2.4.20, FC Driver: qla2300.o with failover option, automatic
> switchover to working FiberChannel path in case of failure of primary
> SAN switch
> Filesystem: SGI XFS 1.2.0 with quota enabled.
> Cyrus mail store partition: 700 Gigabytes
> Cyrus IMAP is here part of the Priscilla Software Package (complete

When you say Priscilla, didn't you want to share it with us :)
I'm interested...


> integration Postfix, Cyrus, automatic vacation replies and LDAP). All
> maintenance is done via
> LDAP (quotas I am on my way to write a web site with this
> package for others to deploy it.
> Webmail (on a different machine): IMP 3.2.1, communicates via IMAPv4 and
> LDAPv3.
> No crashes or problems since start of this project. We moved from Sun
> iPlanet to Cyrus and I wrote some daemons and programs to form an LDAP
> based package.
> The mail machine(s) are part of a mail DMZ. We have 2 front bastion mail
> servers for in/output (postfix), 2 virus scanning machines
> (postfix/amavis) and the Cyrus IMAP server. Load is highest on the virus
> scanners due to their CPU-intensive tasks.
> Next step is integration to a HA environment using Linux-HA project
> (heartbeat with a second machine with the same configuration.
>> How many accounts on each server.
> Approx 11000 (in LDAP tree).
>> The average and peak number of users on each server at a time
> Running imapd processes: approx 300. Running pop3d processes: approx 20.
>> The average and peak number of messages in a folder for your users
>>  (go ahead and estimate here...)
> Max folder: one of my folders with 31000 messages in it. We have
> 1,5 million message files and 30000 folders, so the average is approx
> 50 files per folder.
> People are largely using IMP webmail resulting in many imapd logons and
> logoffs.
>> Are you using murder?  If so, describe your proxies and mupdate
>> server.
> No.
>> Any random thoughts you have.  Would you pick Cyrus if you were free
>> to start over right now? etc.
> Yes, absolutely.
>> What info about you (firstname, lastname, email, organization) is it
>> ok
>> for me to list with your info. (none at all is fine, and that's what
>> I'll
>> assume if you don't say otherwise)
> Pascal, Gienger, Pascal.Gienger at, University of Konstanz,
> South Germany.
> I am not constantly employed at the computing centre, it is a project
> based work so because it works so flawlessly I am getting unemployed
> soon, searching for the next project.
> Pascal

More information about the Info-cyrus mailing list