Build Dynamo from first principles.
Distributed Key-Value Store: build dynamo from first principles
compose the pieces into a design story
Highly available but eventually consistent.
Dynamo-style KV stores ring-partition keys with consistent hashing, replicate to N nodes, use R/W quorums for tunable consistency, and rely on vector clocks or LWW for conflict resolution. They sacrifice strong consistency for availability and scalability.
Consistent hashing with virtual nodes for balance.
Quorum: R+W>N for read-after-write; tunable per request.
Hinted handoff: temporarily store writes for unreachable nodes.
Anti-entropy with Merkle trees keeps replicas in sync over time.
Walk through a write.