> Alex Kramarov wrote:
>
> Hello.
>
> I have to provide a solution to a series of mail servers
> (geographically distributed), serving from 20000 to 100000
> users. Every server will support 1 primary (virtual) domain, and
> probably several small ones. I believe that vpopmail+mysql or
> qmail-ldap can provide a viable solution, but I didn't find any
> benchmarks, comparisons or recommendations to what solution can I use
> according to my load, and I also would like to know from you
> expirience, interesting, is there a machine that can handle 100000
> users (whether Intel or Sun based) alone, or I need to use clustering.
I'm no expert but this is my 2 euro's worth ...
Serveral people here will have experince of this - and 100,000 is
nothing given enought disk space and your users check them mail once a
decade ;-).
What I am trying to say is that you would need to give a usage profile
i.e I expect my users to recieve X amount of mail a day, send Y and
check every Z minutes|hours.
Also how much space will you allow them to have - which will dictate the
ammount of disk space you will need.
Another issue may be how often you will add new users or change existing
passwords (assuming a pop3 pickup) as this may alter your decision as to
wherther to use CDB, mysql, Oracle or LDAP to store users information.
CDB is the fastest, but has the slowest rebuild / update time - whereas
a DB / LDAP based method is quicker to update, but more complex and
slower to query (compared to CDB).
>
> Any input will be apriciated.
>
> Alex.
>
> P.S. I am surprised to see the lack of such info on qmail.org, maybe I
> will compile a page from the responces I get (if I get them).
Have you searched the archives ?
Greg
ps please stop the HTML email !
