HLD Fundamentals #6 : Consistent Hashing: The Smart Way to Scale Distributed Systems (opens in new tab)

Consistent Hashing Explained: The Smart Way to Scale Distributed Systems Most system design interviews eventually reach a point where the interviewer asks: "What happens when a new server is added?" At first, scaling sounds easy—just add another machine. But in distributed systems, adding or removing servers can cause massive data movement, cache misses, and performance degradation if data distribution isn't handled correctly. This is exactly the problem Consistent Hashing solves. It is one o...