what's more we plan to centralize two more companies mailbox (about 50+200 mailbox) so we need a system which able to handle about 500 mailbox and about 200 concurrent users.
Mark E. Mallett wrote:
On Wed, May 28, 2003 at 01:46:33PM +0200, Farkas Levente wrote:
the first on is the load. has anybody else use dovecot in a real enviromnt with at least hundreds of users and at least 50 concurrent user at the same time? it seems to me no one else just me.
That seems like an awfully high percentage of users connecting- if I assume "hundreds" might mean 300, 1 out of every 6 users is connected at any given time?
One of the servers running dovecot here has thousands of users. During the middle of the day I typically see 17-20 users connected at any given time. This has been known to increase to 50+ especially during prime time (evening). Over a period of 24 hours dovecot logins occur at the rate of around 2.5 logins per second. Now- most of our users are using POP rather than IMAP, but there is still a reasonable amount of IMAP activity. Plus I'm not sure that detail matters: POP logins use resources too, perhaps repeated POP logins use more than constantly-connected imap sessions.
The load on the server due to dovecot is negligable. Most of the load is due to handling incoming mail. Obviously you are seeing something different- perhaps you are using features that we are not.
I rather wish dovecot would log some more statistics, as I think has been mentioned already- like a record for logout as well as one for login, including number of messages scanned, left on server, downloaded, and deleted, plus total bytes transferred). These numbers would give a better picture of what's going on.
-mm-
-- Levente "Si vis pacem para bellum!"