What is 2PC in distributed systems?

Two-Phase Commit: coordinator polls participants for 'ready,' then commits or aborts. Blocks everything if coordinator dies.

Saga pattern vs 2PC which is better?

Sagas for scalability and availability in microservices. 2PC for strict ACID in legacy setups. Sagas win most modern cases.

How to implement distributed transactions?

Start with Sagas using event sourcing or orchestrators like Temporal. Avoid 2PC unless forced.

☁️ Cloud & Infrastructure

Distributed Transactions: Why 2PC Still Haunts Your Microservices (and Sagas Won't Fully Save You)

You've built microservices. Great. Now watch distributed transactions turn your system into a locked-up mess. 2PC promises ACID; Sagas promise availability. Both lie a little.

DevTools Feed Apr 03, 2026 4 min read 45 views

Flowchart comparing 2PC prepare-commit phases vs Saga compensating transactions

⚡ Key Takeaways

2PC guarantees ACID but blocks and fails hard — legacy for a reason. 𝕏
Sagas trade strong consistency for availability via compensating transactions. 𝕏
Most teams overengineer; focus on idempotency and boundaries first. 𝕏

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