This content originally appeared on DEV Community and was authored by Wakeup Flower
1️⃣ ACID
ACID is a set of properties that ensure database transactions are reliable. Each letter stands for:
| Letter | Meaning | What it ensures |
|---|---|---|
| A | Atomicity | A transaction is all or nothing. If one step fails, the entire transaction is rolled back. |
| C | Consistency | The database moves from one valid state to another valid state. Data integrity rules are never violated. |
| I | Isolation | Concurrent transactions don’t interfere with each other. The end result is the same as if transactions ran sequentially. |
| D | Durability | Once a transaction is committed, it cannot be lost, even if there’s a crash. |
✅ Example: Transferring \$100 from Alice → Bob
- Atomicity: Both debit and credit happen, or neither happens.
- Consistency: Total money in the system remains the same.
- Isolation: Two transfers happening at the same time don’t mix up balances.
- Durability: Even if the DB crashes immediately after, the transfer persists.
So ACID properties are essential for financial data, as in your scenario.
This content originally appeared on DEV Community and was authored by Wakeup Flower
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Wakeup Flower | Sciencx (2025-09-18T14:40:24+00:00) Atomicity Consistency Isolation Durability = ACID. Retrieved from https://www.scien.cx/2025/09/18/atomicity-consistency-isolation-durability-acid/
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