Thanks for the pointer, but it's kind of a hassle as there's no debian packages for phpredis. We could package it ourselves, but thats just more stuff to maintain.
Has anyone ever gotten memcached to be truly redundant? I cant seem to get it so if I bring 1 (of many) memcached down, then bring it back up, it still works right. Roundcube sees an empty server and assumes there's no session key. Memcache has a replication/fallback system but i cant get it to work.
Cor