What is the trade-off between ACID and eventual consistency?
ACID gives stronger guarantees but can limit horizontal scaling. Eventual consistency allows better horizontal scaling and availability at the cost of temporary inconsistency. Choose based on how critical immediate consistency is for your app.
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More FAQs in ACID vs Eventual Consistency: Understanding Database Guarantees
ACID (SQL) guarantees atomicity, consistency, isolation, and durability for every transaction. Eventual consistency (some NoSQL) allows temporary inconsistency between replicas in exchange for better scaling and availability, eventually converging.
For critical data like banking, payments, and inventory where every transaction must be all-or-nothing and data must be immediately consistent. SQL databases like PostgreSQL provide ACID guarantees for these use cases.
For social media feeds, analytics, search, and other data where temporary inconsistency is fine. The system eventually converges, and users do not notice slight delays in propagation.
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