Remote unit of work
The remote unit of work facility also provides for the remote preparation and execution of SQL statements, but in a much more restricted fashion than the distributed unit of work facility.
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, and all SQL statements in the same unit of work must be executed by the same database server. However, unlike a distributed unit of work, an application process can have only one connection at a time. The process cannot connect to a new server until it executes a commit or rollback operation on the current server to end that unit of work. This restricts the situations in which a CONNECT statement can be executed.