seniorPHP
Explain advanced distributed transaction patterns (Saga vs 2PC vs compensating actions) in PHP microservices.
Updated May 24, 2026
Short answer
Distributed transaction patterns coordinate consistency across services using Saga workflows or traditional 2-phase commit mechanisms.
Deep explanation
In microservices, ACID transactions across services are impossible.
- Two-Phase Commit (2PC)
- prepare phase
- commit phase
- strong consistency
- blocking nature
- Saga Pattern
- sequence of local transactions
- compensating actions on failure
- eventual consistency
Types of Saga:
- orchestration (central controller)
- choreography (event-driven)
- Compensating actions
- undo previous steps
- not true rollback
Challenges:
- partial failure handling
- state tracking
- retry complexity
- idempotency requirements…
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