Milter-greylist

--- In milter-greylist@yahoogroups.com, Oliver Fromme <olli@...> wrote:

> I think there are other -- maybe better -- ways to improve
> scalability.  For example, when you've got 20 servers, then
> don't use all of them for the same set of domains.  Instead
> you should partition them into sets that create roughly
> the same load ("divide and conquer"), e.g. use 5 sets of
> 4 servers for different domains.  That will cut the MX sync
> traffic down by 75%.

This only works when serving multiple domains. As long as a single
domain can be handled by one or only a handful of mx servers, the
current milter-greylist solution is fine.

The focus here is what if we need a significant (>50) number of
servers to handle a single domain? A database backend, even with its
inherent overhead, then suddenly starts to make sense.