Redis and memcached aren't really that similar. Memcached is a key-value cache; it will evict items that haven't been used recently, and it has no persistence.

Redis and memcached aren't really that similar. Memcached is a key-value cache; it will evict items that haven't been used recently, and it has no persistence. Redis actually makes a serious effort to not silently lose data. (Unless you tell it to.)