Distributed unit of work
The distributed unit of work facility provides for the remote preparation and execution of SQL statements.
An application process at computer system A can connect to a database server at computer system B and, within one or more units of work, execute any number of static or dynamic SQL statements that reference objects at B. All objects referenced in a single SQL statement must be managed by the same database server. Any number of database servers can participate in the same unit of work, and any number of connections can exist between an application process and a database server. A commit or rollback operation that does not specify a savepoint ends the unit of work.