Creating Game Leaderboards with Redis
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The document discusses creating gaming leaderboards using Redis, highlighting its effectiveness in displaying user rankings. It outlines the requirements for leaderboard functionality and the architecture needed to support millions of users efficiently. Challenges include scaling and transaction management, but Redis is emphasized as an optimal choice for performance and ease of use.
Creating Game Leaderboards with Redis
- 1. Creating Gaming Leaderboards Using Redis Ronny López Technical Lead Backend [email protected]
- 2. Leaderboards • Effective way to show where a user stands within a gamified system • Absolute leaderboards – incentivize • Relative leaderboards – avoid disengagement of players at lower end of rankings • Several type of rankings (weekly, monthly, friends, …) 2
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- 6. Requirements • • • • • • • Add member Remove member Update member score Find member score Find member rank Associate data to members (Name, Alliance, etc…) Get slices of the ranking (for pagination) 6
- 7. Architecture Scalable to serve several million active users Performance is a must 7
- 8. Implementation • • • • • • Redis data structure server Sorted set data structure Different sorted sets for different kinds of rankings Redis hash data structure for member associated data Lua scripting for aggregating in-memory data (Sorted) Sets operations (union, intersection, etc…) 8
- 9. Challenges • Horizontal scaling • It is not possible to shard a dataset with a single huge key like a very big sorted set • Two-phase commits if you want to execute a transaction among different data stores 9
- 10. Summary • Redis is the right tool for the job, but datasets can not be bigger than memory • Exceptional performance (more than 8K leaderboard ops per second in a single instance) • Easy to use and understand technology • Mature and open source 10