On Jan 5, 2004, at 12:01 PM, Kjetil Torgrim Homme wrote:
> On Mon, 2004-01-05 at 11:37, Odhiambo G. Washington wrote:
>> My New Year resolution is to establish a system that will support both
>> redundancy and high availability. This will only involve two boxes
>> running Exim on FreeBSD platform. The users will be in a MySQL db but
>> I
>> also have file-based lookups.
>
> okay, but then the MySQL db becomes the single point of failure, and it
> is also hard to keep the files in absolute sync across Exim servers.
> the latter may not be a big problem, depending on your configuration,
> but you need to consider what happens when they're out of sync -- can
> e-mail messages loop?
>
> we're using LDAP generated from a database as our backend for _all_
> configuration data. replicating an LDAP service is a well-known
> problem, and many organizations need that anyway for other services.
Replicating MySQL is also extremely well-known and well-documented.
George
// George Schlossnagle
// Postal Engine --
http://www.postalengine.com/
// Ecelerity: fastest MTA on earth
