Distributed Relational Database Architecture › What Is DRDA? › Remote Unit of Work

Remote Unit of Work

For Remote Unit of Work:

• Within a single unit of work, users or applications can read and update one system at a time using multiple SQL statements.
• There is one Relational Database Management System (RDBMS) per unit of work.
• There is one unit of work manager or recovery unit.
• The application controls the commit/rollback of data.

At the RUOW level, distribution of processing is limited to a Logical Unit of Work (LUOW) between two systems, the application requester or master, and the application server or slave.

Only one LUOW can be active for each job, restricting the application requester to making contact with one system at a time. However, within the program it is possible for the application requester to contact several different application servers. The program controls commit and rollback, and you must make provisions for them at the program level.

Note: Since the RUOW applies at the job level (routing step), any changes of RDBs within any program will change the RDB of the whole job stack.