What is the best way to list every key stored in memcached?
My answer to What is the best way to list every key stored in memcached? on Quora
Redis might be a better bet for this—it has a “KEYS *” command which can return every key in the dataset, and its GET and SET performance are comparable to memcached.
You can also set expiring keys within Redis, at which point it behaves very much like memcached. I’ve seen quite a few people use it as a drop-in memcached replacement, though you need to use be already using an abstraction in your code (such as Django’s built in caching layer) if you want to make the switch without any widespread code changes.