Wietse Venema:
> Combining memcache and proxymap
> -------------------------------
>
> It seems that memcache is best for (surprise) doing what it was
> designed for: a cache layer on top of a persistent database, where
> the cache is maintained by the clients of the persistent database.
...
> The idea is that the memcache client delegates persistent database
> access to the proxymap server. Whenever the memcache client looks
> up or modifies the persistent database, it updates the memcache
> server to keep the cache up-to-date (clearly, cache consistency
> won't be perfect, so information should be cached for only a limited
> time).
Done in postfix-2.9-20111211-nonprod; the code is very lightly tested.
Wietse
