[Kolab-devel] Cyrus Murder and kolab

[Matt Douhan]

On Monday 16 May 2005 12.55, christophe robert wrote:
> Martin Konold wrote:
> >Am Freitag, 13. Mai 2005 11:29 schrieb Michael Harlaut:
> >
> >Hi,
>
> If i reformulate my question .
>
> How many users i could  to put in one server  ( with kolab ) and when i
> must to install a design like murder ..
>
> for example :
> If i have around 5000 or 10000  users and  90000 mails  by day ,   is
> it  serious with kolab to have a centralized server .

90000 emails / day = 90000 / 24 = 3750 emails / hour wich is ok for a decent 
single CPU P4 and 1GB RAM box

We are handling 5000 emails / hour on a Xeon 3Ghz / 2 GB RAM IBM server and 
that runs nicely, just do not underestimate disk I/O when you design your 
server.

Also the busier the server you need to consider your backup solutions and make 
sure the filesystem has snapshot capabilities, otherwise service disruption 
will be huge when you have to stop the imap master to backup the message 
store, we use FreeBSD and the -L flag to dump and that allows us to backup a 
live filesystem.

We have 2 even larger installations than this too, but I cannot go into to 
much details about them in public before asking the clients.

rgds

Matt

-- 
Matt Douhan
www.fruitsalad.org
kolab + toltec + horde + kontact == success