Re: [exim] heartbeat load balancing and exim

Thanks both for some very helpful information. Yes I understand I am
mixing HA and load balancing, but they do somewhat overlap. In that load
balancing also causes HA. Since if a server fails there will not be any
downtime, as long as there are other servers still up.

Christian Recktenwald wrote:

> To get the idea think of two SMTP listeners just receiving
> mail and instantly writing them to a common storage.

The common storage part would become an additional weak link, since it
introduces something one tried to eliminate, a single point of failure.
Also I am not sure also how well exim would work with something like NFS.

> different priority. Any of them may fail without causing
> interruption of service. No additional LB or HA setup needed
> here. (For POP/IMAP it's not as easy.)

I agree yes. NFS for example introduces more trouble than it solves in
the case of pop/imap.

Anyways, enough food for thought...

Jeroen