Consistent Hashing: The Math Behind Load Balancing

Hey there! 👋

Imagine: you have 1000 servers and millions of requests. How do you distribute load evenly so that adding a new server doesn’t require rehashing everything?

Regular hash(key) % servers becomes a disaster when scaling. Add one server and 90% of data needs to be moved!

But there’s an elegant solution: Consistent Hashing. The mathematics that saves you from chaos in distributed systems.

Let’s dive into the algorithm used by Amazon DynamoDB, Cassandra, and Redis Cluster 🚀