The recently released TokuDB brings many features. One of those features is support for XA Transactions. InnoDB already has support for XA Transactions. XA Transactions are transactions which span multiple databases and or applications. XA Transactions use 2-phase commit, which is also the same method which MySQL Cluster uses. Internal XA Transactions are used to keep the binary log and InnoDB in sync. Demo 1: XA Transaction on 1 node: mysql55-tokudb6> XA START 'demo01'; Query OK, 0 rows affected (0.00 sec) mysql55-tokudb6> INSERT INTO xatest(name) VALUES('demo01'); Query OK, 1 row affected (0.01 sec) mysql55-tokudb6> SELECT * FROM xatest; +----+--------+ | id | name | +----+--------+ | 3 | demo01 | +----+--------+ 1 row in set (0.00 sec) mysql55-tokudb6> XA END 'demo01'; Query OK, 0 rows affected (0.00 sec) mysql55-tokudb6> XA PREPARE 'demo01'; Query OK, 0 rows affected (0.00 sec) mysql55-tokudb6> XA COMMIT 'demo01...