HardDesign: Distributed Key-Value Store (Redis/DynamoDB)

Your KV store cluster needs to add 10 new nodes to increase capacity. How do you do this without downtime?

— Tests your understanding of this concept.

Want to see the correct answer?

Get the answer with a detailed explanation, plus practice 22+ more Design: Distributed Key-Value Store (Redis/DynamoDB) questions with adaptive quizzes and timed interviews.

See the Answer on Guru Sishya →

This question is from the Design: Distributed Key-Value Store (Redis/DynamoDB) topic (System Design Cases).

Learn Design: Distributed Key-Value Store (Redis/DynamoDB)→Browse All Questions

More Design: Distributed Key-Value Store (Redis/DynamoDB) Questions

What does the CAP theorem state?

Hard

What is the advantage of consistent hashing over modulo hashing for data distribution?

Hard

For N=3 replicas, W=2 writes, R=2 reads: is strong consistency achieved?

Hard

Two clients simultaneously write different values to the same key on two different nodes (network partition). How do you resolve this conflict?

Hard

What is the purpose of virtual nodes (vnodes) in consistent hashing?

Hard