It can do things memcache can do and way more. Like storing other data types. Persisting storage to disk. Geospatial queries. Pub/sub. Lua scripting. So, no, t

It can do things memcache can do and way more. Like storing other data types. Persisting storage to disk. Geospatial queries. Pub/sub. Lua scripting. So, no, they are not interchangeable! Only if you just store keys and strings and do not care about persistence.