GoodNotes Architect Journal
๐Ÿ  Index 1. Single Server 2. Selecting DB 3. Relational & SQL 4. ACID Integrity 5. NoSQL Types 6. Scaling Guide 7. Load Balancing 8. SPOF & HA 9. API Design 10. Comm Protocols 11. TCP & UDP 12. REST Design 13. GraphQL Architecture 14. Authentication Protocols 15. JWT & OAuth 2 16. Authorization Models
System Design Chapter 4

Transactional Integrity & ACID Properties

Ensuring Reliable Database Transactions

โ˜… ACID makes SQL the gold standard for banking & financial transactions!

Relational databases ensure strict transactional safety through ACID guarantees:

๐Ÿ…ฐ๏ธ Atomicity

Transactions execute completely or fail entirely (โ€œAll or Nothingโ€). Partial updates are rolled back.

๐Ÿ…ฒ Consistency

Moves data from one valid state to another valid state, maintaining schema constraints.

๐Ÿ…ธ Isolation

Concurrent transactions execute without dirty reads or interference from parallel tasks.

๐Ÿ…ณ Durability

Committed data changes remain permanently stored, even during power or hardware failure.