ACIDtehnoloogiat

ACIDtehnoloogiat refers to a set of properties that guarantee reliable processing of database transactions. ACID is an acronym for Atomicity, Consistency, Isolation, and Durability. These properties are crucial for maintaining data integrity in systems that handle financial transactions, inventory management, or any application where data accuracy is paramount.

Atomicity ensures that a transaction is treated as a single, indivisible unit of work. Either all operations within the transaction are completed successfully, or none of them are. If any part of the transaction fails, the entire transaction is rolled back, leaving the database in its original state.

Consistency guarantees that a transaction brings the database from one valid state to another. It ensures that any data written to the database must be valid according to all defined rules, including constraints, cascades, and triggers.

Isolation ensures that concurrent transactions do not interfere with each other. Each transaction appears to execute as if it were the only transaction running in the system. This prevents issues like dirty reads, non-repeatable reads, and phantom reads.

Durability ensures that once a transaction has been committed, it will remain so, even in the event of power loss, crashes, or other system failures. The committed data is permanently stored.

Implementing ACID properties can introduce performance overhead, and some modern distributed systems may opt for weaker consistency models depending on their specific use cases and tolerance for potential data inconsistencies. However, for many applications, ACID compliance remains a fundamental requirement for dependable data management.