I hope this question is still on topic, but recently I found a key-value store programmed in Perl. It was pretty simple, RAM based and I think it had just set and get and also an ‘expire’ option for keys. I also think it came with as both XS and pure Perl version.
I have been searching for quite a while now and I not sure whether it is on CPAN or I saw it on GitHub. Maybe someone knows what I am talking about.
Do you mean Cache? It can store key/value pairs in a number of places, including shared memory.