Xpand most closely matches the InnoDB storage engine. All tables in Xpand are fully transactional and ACID-compliant and use the MVCC model for concurrency control. For compatibility purposes, the default engine type is listed as InnoDB but the Clustrix engine type is applied.
Xpand also accepts syntax for setting the engine type to ndb, ndbcluster, myisam, mrg_mysisam but the Clustrix engine is always used.