Also I had a redis clone from before, but with AI i separated the epoll layer from the actual database engine which made it sort of embeddable. And hooked that embeddable database into a JNI interface, and now it can run inside Android applications, sort of like a concurrent hash map, but one that lives off heap and has support for TTLs and mget, msel, mdel, hashes and all that. I use it for some silly android games.