Relating to Memcached FAQ (http://code.google.com/p/memcached/wiki/
FAQ#How_does_memcached_work?), it is clear that when you use more than
on server for memcache, each key exist only one time, and only on one
server.
We are using 2 servers for memcached and 3 servers for app.
Lately we noticed
Normal, default operation of a memcached client is to failover to the
next server when a connection fails. So it is possible to have one key
exist on more than one server. However, most clients have an option to
turn this feature off. In those cases, a failed connection would lead to
the
This smells like you're configuring your clients wrong... The client list
must be _exactly the same_ on every app server. Don't reorder them or put
localhost in there.
It's also possible that appserv2 can't reach one of the memcached daemons
as well, and is putting keys on the only available
