Nakama

One of those multiplayer lobby toolkits but this one is open core instead of fully proprietary.

• Open-core. Witholds all the scalability/clustering features for the proprietary edition.
• Developers say all of the database altering functions are stateless so do not need to be clustered (passes the buck to the DB server.)
• “Real time” features are clustered by means of a presence list (stores server id, user id and a socket?) which replicates using CRDTs. Supposedly avoided Raft/Paxos because they want everything to keep working during network partitions.
• Outside the corpo version scaling has to be done manually (ex. With load balancers, clever separation of users,
• Manages real-time events by just proxying from the game to each other client in the same session.
• “Authorative” sessions pass messages through the server for validation/modification before transmitting them off to other members of the session.