InnoDB is a storage engine for MariaDB or MySQL that provides high reliability and high performance. It supports ACID-compliant transactions and is fully transactional and recoverable, which greatly improves data integrity. It also supports foreign keys for referential integrity and enables row-level locking, which increases multi-user concurrency and performance. Despite being slower than other storage engines, InnoDB’s support for transactions and advanced features makes it the default choice in many applications.
