Hello,
Exim 4.50 and OpenLDAP 2.2.23 (Debian Sarge).
I have a pair of LDAP servers for the various mail servers, that is I
HAD a pair. One of them expired (hardware failure) and this happened
to be the first one in the ldap_default_servers definition.
Which resulted in massive delays/timeouts until I manually changed
the sequence to have the working one first.
Now, I fully realize that exim doesn't keep a state of these things, but
maybe some sort of hinting mechanism would be a nice addition for the
future.
Am I correct in assuming that with my LDAP server defined (in DNS)
as a host with 2 IP addresses (and just one entry in exim.conf) I
would still have suffered delays, but 50% less on average?
I of course could turn LDAP into a HA service (already running
heartbeat for other services on these hosts in that mode), but I
preferred to do poor man's load balancing via the exim.conf LDAP
server ordering as opposed to an active/standby configuration.
So what I'm saying (again ;) is I'd like to see exim fail over
in a more semi-permanent way when trying to reach external
database servers like LDAP.
Dewa,
Chibi
--
Christian Balzer Network/Systems Engineer NOC
chibi@??? Global OnLine Japan/Fusion Network Services
http://www.gol.com/
