Why adding a cache node shouldn’t move every key
7 min read The math behind hash rings, why virtual nodes exist, and what a designer probes the moment you reach for consistent hashing. Read article
System Design
System Design
When to partition, when to shard, and when to just replicate
7 min read The difference between partitioning, sharding, and replication that interviewers keep probing, and how to reason about which one a system actually needs. Read article
