ACIDachtige

ACIDachtige is a term used in the context of database management systems to describe a set of properties that ensure reliable processing of database transactions. The term is derived from the acronym ACID, which stands for Atomicity, Consistency, Isolation, and Durability. These properties are crucial for maintaining the integrity and reliability of data within a database.

Atomicity refers to the all-or-nothing principle, ensuring that each transaction is treated as a single unit, which either completes entirely or fails completely. If any part of the transaction fails, the entire transaction is rolled back to its initial state.

Consistency ensures that a transaction brings the database from one valid state to another, maintaining predefined rules such as constraints and cascades. This property guarantees that the database remains in a consistent state before and after the transaction.

Isolation ensures that concurrent transactions do not interfere with each other. Each transaction is executed as if it were the only transaction running in the system, preventing issues such as dirty reads, non-repeatable reads, and phantom reads.

Durability guarantees that once a transaction has been committed, it will remain so, even in the event of a system failure. This is typically achieved through the use of transaction logs that can be used to recover the database to a consistent state after a crash.

The ACID properties are essential for applications that require high levels of data integrity and reliability, such as financial systems, e-commerce platforms, and other critical applications. However, in some scenarios, especially those involving high-performance requirements, the strict adherence to ACID properties may be relaxed to achieve better performance and scalability. In such cases, alternative models like BASE (Basically Available, Soft state, Eventual consistency) may be used.