Write Ahead Log

Quick Definition

Persistence mechanism writing changes to log before database

A persistence mechanism where changes are written to a log before being applied to the actual database.

crash recovery, transaction durability, replication

acid transaction durability

Theorem on Consistency, Availability, Partition tolerance trade-offs

Standard language for managing and querying databases

Version-controlled changes to database schema

Database storing data in structured tables with relationships

Properties guaranteeing reliable transaction processing

Single unit of work that succeeds or fails completely