InnoDB

InnoDB is a storage engine for the MySQL relational database management system. It is the default storage engine for MySQL as of version 5.5.1, replacing the older MyISAM engine. InnoDB is designed to handle high-volume transaction processing, offering features such as ACID compliance, row-level locking, and foreign key constraints. It uses the MVCC (Multi-Version Concurrency Control) method to maintain data integrity and improve performance. InnoDB stores data in a clustered index, which means that the data is stored in the same order as the primary key. This can lead to faster read operations for queries that use the primary key. InnoDB also supports full-text search, spatial data types, and geospatial indexing. It is widely used in production environments due to its reliability and performance. InnoDB is also available as a standalone database server, known as MariaDB.