Wietse Venema: > Django [BOfH]: > > Via clusterfs Klaus may share /var/lib/postfix/cachepool between all 4 MX. > > LMDB Postfix caches support sharing; non-LMDB caches cannot be > shared at all.
To be precise: LMDB Postfix caches support shared access by readers and writers. Other caches cannot be shared by writers or by readers+writers. Read-only sharing is OK, but irrelevant for caches. > However, the Postfix LMDB client requires fcntl locks. If clusterfs > does not support fcntl locks, then things will blow up. If fcntl > performance sucks, use memcache without persistent backup. > > Wietse >
