ACID Transactions
ACID Transactions
Distillation — one idea, in my words
- Write the irreducible insight. 50–120 words.
- State the claim/definition in one sentence first.
- Remove source phrasing; keep mechanism or rule.
- If you feel the need for “and,” split into another atom.
The acronym ACID stands for atomicity, consistency, isolation, and durability.
| ACID Component | Definition/Function | Key Mechanism in Delta Lake |
|---|---|---|
| ACID - Atomicity | Ensures a transaction is treated as a single, indivisible unit; it either completes entirely or fails entirely. | Operations (like update/delete) are wrapped in a single ordered atomic commit in the transaction log file. |
| Consistency | Ensures data remains in a valid state after any transaction. | Rollback of changes upon process failure; Schema enforcement/evolution. |
| Isolation | Guarantees that concurrent transactions do not interfere with one another. | Multiversion Concurrency Control (MVCC); Snapshot isolation for reads. |
| Durability | Guarantees that once a transaction is committed, the changes are permanent. | The immutable transaction log permanently records all changes. |
Why it matters – 1-3 bullets on utility, mechanism, implication.
- What decision does this change?
- What prediction does this enable?
- What failure does this prevent?
Links
- Does this collide/agree with an existing atom?
- Add at least one forward link to a molecule/canonical note.
- Add one tag-like topic (2–5 terms, not a dump).
- Broader topic:
- Related atoms:
- Upstream source note:
Source excerpt (optional)
Paste exact quote or figure caption.
Citation block (optional)
Source: {{source}} • Page: {{page}} • Key: {{citekey}}