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 source data being regenerated.
Brian.
--------
http://brian.moonspot.net/
On 6/20/10 10:22 AM, Shaulian wrote:
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 that when we request the same key from AppServ1, it
returns DIFFERENT value when requesting it from AppServ2.
We tried to delete the key from BackOffice in AppServ1, but it was
still exist on AppServ2.
All the above clearly points that the key exists on each server.
We're using .NET memcached client library (http://sourceforge.net/
projects/memcacheddotnet/).
Anyone experienced such a thing ?
