How Saga Pattern Solves Distributed Transactions in Microservices

On Black Friday, inventory vanished. Revenue flatlined. 
The order existed. The stock was locked. But the payment had failed.

And here's the worst part — you can't just type ROLLBACK. 
The moment that transaction crossed a service boundary, your rollback button stopped existing.

That is the Distributed Transaction Problem. And the Saga Pattern is the fix.

In this video I break down exactly how Saga works — from the monolith's ACID guarantee 
all the way to Choreography vs Orchestration, with fully animated diagrams and real 
system design walkthroughs.

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🕐 TIMESTAMPS
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0:00  The Black Friday incident
1:45  How the monolith solved this (ACID transactions)
3:15  Database-Per-Service — why we broke the safety net
4:20  The Distributed Transaction Problem (step by step)
6:10  What is the Saga Pattern?
7:10  Compensating Transactions — not rollback, compensation
9:10  Saga Approach 1: Choreography (the wedding dance)
11:00 Saga Approach 2: Orchestration (the conductor)
12:50 Choreography vs Orchestration — which one should you pick?
13:10 The new problem Saga quietly creates (and what's next)

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📌 WHAT YOU'LL LEARN
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✅ Why distributed transactions are impossible in microservices
✅ What a compensating transaction is (and how it differs from rollback)
✅ How Choreography coordinates services without a central boss
✅ How Orchestration uses one brain to control the entire flow
✅ When to use each — and why large orgs reach for Orchestration

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🔗 SERIES — System Design Patterns
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▶ Next: API Composition Pattern (coming soon)
▶ Database-Per-Service Pattern
▶ Event-Driven Architecture

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so you don't miss the API Composition Pattern next.

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Playlists:

Microservices Design Patterns: https://www.youtube.com/playlist?list=PL2MKEvl7Sd7mPNjJ-JFu04kt-e1SRB93w

Tree Data Structure: https://www.youtube.com/playlist?list=PL2MKEvl7Sd7nEG9CZ6Q4uxz8NO6K0Q3aN

Linked List: https://www.youtube.com/playlist?list=PL2MKEvl7Sd7kiZnlk1cxRuzRluekdntFy

Time Complexities: https://www.youtube.com/playlist?list=PL2MKEvl7Sd7leuFfXExK3V8vdy37LutSJ


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