InnoDB is the most popular transactional storage engine for MySQL. InnoDB provides full support of standard SQL isolation levels for ACID-compliant transaction processing, and maximizes throughput with row level locking and multiversion concurrency control (MVCC). InnoDB provides high performance by using many techniques to minimize expensive disk I/O through the efficient use of memory and processor resources. InnoDB ensures data integrity and reliability, with such capabilities as referential integrity support and automatic data recovery following hardware and software failures.