Layer 4 — Data

Series: Modern System Design

Layer 4 is data correctness. Transactions, isolation, sagas, and change streams are how you keep facts straight when more than one machine is involved.

Posts

1. ACID

2. Transactions

3. Isolation Levels

4. Optimistic vs Pessimistic Locking

5. Eventual Consistency

6. Distributed Transactions

7. Two-Phase Commit

8. Sagas

9. CQRS

10. Event Sourcing

11. Change Data Capture

12. BASE

13. Transactional Outbox

14. Dual Writes

15. CRDTs

16. Logical Clocks

17. Bloom Filters

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