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DB2® Universal Database for OS/390® Version 7.1 Certification Guide by Susan Lawson, Richard Yevich

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Distributed Data

Using the distributed data facility (DDF) of DB2 will allow for access to data held by other data management systems, or to make your DB2 data accessible to other systems. A DB2 application program can use SQL to access data at database management systems (DBMSs) other than the DB2 at which the application's plan is bound. This DB2 is known as the local DB2. The local DB2 and the other DBMSs are called application servers. Any application server other than the local DB2 is considered a remote server and access to its data is a distributed operation. DB2 provides two methods of accessing data at remote application servers: DRDA and DB2 private protocol access.

For application servers that support the two-phase commit process, ...

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