Quorums, Replication & Read Repair

R + W > N, sloppy quorums, hinted handoff, read repair, anti-entropy, and leaderless replication.

0 / 6 solved

Question Tags Difficulty Success

1. All Three or Bust

quorumavailability +1

Easy —

2. The Keys Nobody Reads

anti-entropyread-repair +1

Medium —

3. Two Down Still Correct

quorumreplication +2

Medium —

4. Replica Comes Back Stale

read-repairvector-clock +2

Medium —

5. Quorum With Loose Ends

sloppy-quorumhinted-handoff +1

Hard —

6. Overlap Is Not Enough

quorumsloppy-quorum +2

Hard —

Learning Resources

Amazon Dynamo paper

Up next

6 of 6 questions here are still unsolved.

Next module Consensus: Raft, Paxos & Leader Election