[Dovecot] Questions about Proxy/Director

[Jan-Frode Myklebust]

On Thu, Nov 24, 2011 at 11:58:01PM +0100, Patrick Westenberg wrote:
> 
> What is your frontend configuration?

The frontend is two servers running dovecot director, and ucarp for
managing failover ip-addresses.

=====================================================================
# 2.0.14: /etc/dovecot/dovecot.conf
# OS: x86_64 Red Hat Enterprise Linux Server release 5.x 
director_mail_servers = 192.168.42.7 192.168.42.8 192.168.42.9 192.168.42.10 192.168.42.11 192.168.42.28 192.168.42.29
director_servers = 192.168.42.15 192.168.42.17
disable_plaintext_auth = no
listen = *
lmtp_proxy = yes
passdb {
  args = proxy=y nopassword=y
  driver = static
}
service anvil {
  client_limit = 2051
}
service auth {
  client_limit = 4196
  unix_listener auth-userdb {
    user = dovecot
  }
}
service director {
  fifo_listener login/proxy-notify {
    mode = 0666
  }
  inet_listener {
    port = 5515
  }
  unix_listener director-userdb {
    mode = 0600
  }
  unix_listener login/director {
    mode = 0666
  }
}
service imap-login {
  executable = imap-login director
  process_limit = 1024
}
service lmtp {
  inet_listener lmtp {
    address = *
    port = 24
  }
}
service pop3-login {
  executable = pop3-login director
  process_limit = 1024
}
ssl_cert = </etc/pki/tls/certs/cert.ca-bundle
ssl_key = </etc/pki/tls/private/cert.key
protocol lmtp {
  auth_socket_path = director-userdb
}
=====================================================================

> How many users do you have that you need that many backend servers?

I don't think I'm allowed to share that externally, sorry. This is the
mail-system of an ISP, so we have quite a few users.. :-)

> Are your index stored together with the mails?

They're not stored together, because we made the error of not creating a
home directory for our users, but both maildirs and indexes are stored on 
similar cluster fs' (GPFS).


  -jf