Dynamo: Amazon’s Highly Available Key-value Store
Q: What's a typical number of nodes in a Dynamo instance? Large enough that vector clocks will become impractical large? Q: How can deleted items resurface in a shopping cart (Section 4.4)? Q: How does Dynamo recover from permanent failure -- what is anti-entropy using Merkle trees? Q: What are virtual nodes? Q: Will Dynamo's use of a DHT prevent it from scaling? Q: What's a gossip-based protocol?