Distributed Systems 5.1: Replication

3-Second Blueprint (English)

1. Replicating data across distributed nodes preserves read and write availability during software crashes, hardware faults, or network splits.
2. Designing state updates to be idempotent prevents duplicate network retries from corrupting values, unlike non-idempotent counter increments.
3. Replicas track deletions using timestamped tombstones and reconcile concurrent write conflicts via Lamport or vector logical timestamps.