This series is designed for advanced developers who want to go beyond just using databases and start truly understanding how they work under the hood. We'll explore what makes a good database good, and more importantly, what can go wrong when the foundational principles are misunderstood.
In modern software development, database migrations are crucial for maintaining consistency across different environments. This article introduces DB Migrator, a Spring Boot-based framework designed to simplify database migrations with an auto-configurable and plug-and-play approach.
The term Atomicity refers to the 'all or nothing' rule in transactions. Every query inside a transaction must succeed for the transaction to be committed. If even a single query fails, the entire transaction must be rolled back.
Consistency ensures that data transitions between valid states and maintains correctness across operations. It operates at two levels: data consistency and read consistency, each critical for maintaining database integrity.
Isolation ensures transactions execute independently without interference from concurrent operations. It prevents anomalies like dirty reads, non-repeatable reads, and phantom reads through various isolation levels.
Durability ensures that once a transaction is committed, its changes are permanent, even in the face of system crashes, power failures, or other unexpected disruptions. Learn about WAL, fsync(), and the operating system interactions that make this possible.