ACID vs. BASE Database Transaction Models
Explore the fundamental differences between ACID and BASE database transaction models. Understand how ACID ensures strict consistency and reliability in critical systems, while BASE offers high availability and scalability for web-scale applications. Learn to evaluate these models to make informed design decisions based on your system needs.
Handling data correctly is one of the most critical responsibilities in building any application.
When a user transfers money or books a flight, the underlying database must ensure the operation completes perfectly or not at all, maintaining data integrity. However, in large-scale distributed systems that prioritize availability for millions of users, enforcing such strict rules can create bottlenecks.
This fundamental trade-off between consistency and availability is a central challenge that many candidates face in System Design interviews.
This tension has led to the development of different models for managing data transactions. Understanding these models is essential for making informed architectural decisions that align with our application’s specific needs.
Let’s start with the transaction models.
Transaction models
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For example, a bank transfer involves two operations: debiting one account and crediting another. These two actions must be treated as a single, indivisible unit. If either one fails, the entire transaction must be rolled back. Transaction guarantees are the rules that a database follows to ensure data remains reliable and accurate, even when multiple users perform operations simultaneously.
These guarantees are not one-size-fits-all.
A financial system processing payments requires absolute correctness, where even a momentary error is ...