Fast key-value stores: An idea whose time has come and gone
This paper is very light on details. It defines "RInK architecture" as something which uses stateless application servers w/ key-value store as backend (Redis/Memcached). Section 3 then shows that it's faster to use a stateful application server, but skips any details about scaling/durability which makes the comparison kinda strange. Are they really just comparing a single-threaded in-memory application server with a scalable system of stateless application servers?Their solution (LInK) is a key-value system "as a library": You link it into your application servers and you can then store data (they become stateful). The system will automatically handle sharding, replication, consistency and so on. From your perspective you're working directly on memory. You still need to implement marshalling, but this is only used for sharding/replication across nodes (which the system handles completely for you).They say nothing about how this system handles data consistency/replication/durability, so it's a bit tricky to assess it. They also have this nice note: "(since, for performance, persistence of state is not guaranteed)".Summary: This is a system which couples your application logic with your persistence layer (in the same OS process). This can give you great performance as they co-side with each other.Looks like a very cool project, and I'm actually surprised there not more "database as a library"-projects out there.