MariaDB is an open source database server that offers drop-in replacement functionality for MySQL.
This MySQL fork has been made by its own original developers, triggered by doubts over the future management of MySQL after its acquisition by Oracle (through Sun Microsystems) in 2009. MariaDB is now released under the gnu gpl, and maintained by the community with the intent to maintain a high compatibility with MySQL APIs and commands.
Supported Storage Engines:
- Cassandra (added in 10.0)
- CONNECT (added in 10.0)
- FederatedX (drop-in replacement for Federated)
- Mroonga (added in 10.0)
- SEQUENCE (added in 10.0)
- Spider (added in 10.0)
- TokuDB (added in 5.5)
- XtraDB (DEFAULT, drop-in replacement for InnoDB)
Legacy storage engines:
- Federated (still provided, but FederatedX is recommended instead)
- IBMDB2I (removed in 5.5)
- PBXT (removed in 5.5)