How to set up a real-time leaderboard for an online gaming application?

AWS Elasticache is an in-memory database that provides high performance with low latency. Elasticache for Redis would be the ideal solution for this scenario.

Redis sorted sets are used for computationally complex use cases like gaming leaderboards and it guarantees:

1. Uniqueness
2. Element ordering
3. Real-time re-ranking of new elements

Salient Features of Elasticache-Redis:

1. Auto-Failover capability / Multi A-Z
2. Seamless scaling
3. High Availability with Read Replicas
4. Backup and restoration

Note: Redis is not suitable for multi-thread architectures.

See the below diagram for the sample architecture and "how it works" details.

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