For my small setups of less than a few thousand users, I make a small
script that will dump the db tables to flatfiles.
This goes for postfix, and dovecot, with dovecot using the passwd file
backend.
I did this for a few reasons at first, mainly cause I had to split my
mysql and mail servers across datacenters and didn't want a connection
issue to cause everything to halt. And after that, it just worked
well. I didn't notice a lower load on mysql though, seems dovecot and
postfix already cached good.
Quoting Voytek Eymont <voy...@sbt.net.au>:
Hi, new to dovecot
I'm setting a small postfix/dovecot server for virtual domain/users in mysql
dovecot is on one host, mysql on another
seems to be working, but I'm concerned over performance overhead of this
setup;
dumb Q, is there any 'proxy mysql' or cacheing option I can use ?
any suggestions appreciated
also, my mail users as set as 5000/5000
virtual_gid_maps = static:5000
virtual_uid_maps = static:5000
so, I should use uid/gid 5000/5000 in query below, yes ?
thanks
--
Voytek
---------------------------------------------------------
# dovecot --version
1.2.9
Linux 2.6.32-21-generic-pae #32-Ubuntu SMP Fri Apr 16 09:39:35 UTC 2010
i686 GNU/Linux
# grep -v '^ *\(#.*\)\?$' dovecot-sql.conf
driver = mysql
connect = host=host.tld dbname=ddd user=ccc password=xxx
user_query = SELECT concat('/var/mail/vhosts/', maildir) as home,
concat('maildir:/var/mail/vhosts/', maildir) as mail, 5000 AS uid, 5000 AS
gid, concat('maildir:storage=', quota) AS quota FROM mailbox WHERE
username = '%u' AND active = '1'
default_pass_scheme = MD5
user_query = SELECT '/var/mail/vhosts/%d/%n@%d' as home,
'maildir:/var/mail/vhosts/%d/%n@%d' as mail, 5000 AS uid, 5000 AS gid,
concat('dirsize:storage=', quota) AS quota FROM mailbox WHERE username =
'%u' AND active = '1'
password_query = SELECT username as user, password,
'/var/mail/vhosts/%d/%n@%d' as userdb_home,
'maildir:/var/mail/vhosts/%d/%n@%d' as userdb_mail, 5000 as userdb_uid,
5000 as userdb_gid FROM mailbox WHERE username = '%u' AND active = '1'
