SAGA Transaction Model
The SAGA transaction model is designed for long-lived transactions in distributed and cloud environments. Unlike traditional ACID (Atomicity, Consistency, Isolation, Durability) transactions, which require strict atomicity, SAGA transactions break a long-running transaction into a sequence of smaller sub-transactions. Each sub-transaction is compensatable, meaning if a failure occurs, a corresponding compensating transaction is executed to undo its effects.
How SAGA Works:
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A transaction is divided into multiple steps (sub-transactions).
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Each step completes independently and commits.
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If a failure occurs, compensating transactions roll back previous steps.
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If all steps complete successfully, the transaction is considered successful.
Applications of SAGA Transactions:
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Cloud and Microservices: Ensures data consistency in distributed systems without blocking resources.
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E-commerce: Manages order processing, payments, and inventory updates.
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Banking & Finance: Handles money transfers and loan approvals with rollback mechanisms.
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Travel & Booking Systems: Coordinates flight, hotel, and car rental reservations efficiently.
This model enhances scalability, availability, and resilience in modern distributed applications.
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