This documentation is for Dovecot v2.x, see wiki1 for v1.x documentation.

Server: Dell PowerEdge 1750, Dual Xeon 3GHz HT, 4GB RAM, 3x 74GB 15k SCSI, RAID level-5 PERC 4Di 128MB BBU.

Total mailboxs size: 100G, we have quota :-)

Software: Latest Dovecot, CentOS 5.x, Mysql 5.0 user db.

Users: 10,000, POP, IMAP, SquirrelMail, SMTP-AUTH.

Mailboxformat: maildir

We used Courier-IMAP before, works quite well, but Dovecot have lower load and is more friendly/configurable IMHO.

Every */5 hours rsync to hotswap server (HA via heartbeat).

Sar stat:

                  CPU     %user     %nice   %system   %iowait    %steal     %idle
Average:          all      2.81      0.56      1.66      1.65      0.00     93.32

free -m:

             total       used       free     shared    buffers     cached
Mem:          3804       2903        900          0        357       1265
-/+ buffers/cache:       1280       2524
Swap:         4094          0       4094

DovecotServerInstallations/RHEL/10000 Users (last edited 2009-08-05 16:32:50 by r5ad159)