XtraDB

Percona XtraDB is a storage engine for the MariaDB and Percona Server databases, and is intended as a drop-in replacement to InnoDB, which is the default engine in MySQL.

XtraDB

Developer(s)	Percona
Stable release	10.1
Operating system	Cross-platform
Type	Database engine
License	GNU GPL v2 or proprietary
Website	www.percona.com/software/percona-xtradb/

Up until version 10.1, MariaDB used Percona XtraDB in place of InnoDB as the default storage engine. As of MariaDB 10.2, InnoDB is the default again.^[1]

XtraDB incorporates InnoDB's ACID-compliant design and MVCC architecture, and allows for a greater degree of tuning and scalability.^[2] The engine is also better suited to multi-core processing, which addresses some of the issues known to InnoDB.^[3]