Compile and link with -lmemcached
Expiration works by placing the item into a delete queue, which means that it won’t be possible to retrieve it by the “get” command. The “add” and “replace” commands with this key will also fail (the “set” command will succeed, however). After the time passes, the item is finally deleted from server memory.
Please note the the Danga memcached server removed tests for expiration in the 1.4 version.
If you are using the non-blocking mode of the library, success only means that the message was queued for delivery.
memcached(1) libmemcached(3) memcached_strerror(3)