MySQL™: The World’s Most Popular Open Source Database 179 Storage Engine: InnoDB • Actively developed code from InnoBase Oy & MySQL AB • Full transactions (ACID) with versioning row level locking with automatic cleanup (no vacuum!) – Consistent reads (Oracle style MVCC) • Better concurrency than MyISAM for read/write on the same table • Uses table spaces instead of individual files • MySQL AB provides full support for InnoDB • Is included in MySQL 4 & the MySQL Max binarys • Has now been in active use under heavy load. Was for example used for the FIFA world cup site Copyright 2003 MySQL AB