Access Manager
An access manager provides access to Oracle from non-Oracle based applications.
The Oracle Access Manager for AS/400 resides on the AS/400 and
provides AS/400 applications written in RPG, C, or COBOL access to Oracle
running on any platform. You can access Oracle from these applications through
ANSI-standard SQL or through Oracle DML or DDL. Because PL/SQL is also
supported, AS/400 applications can call Oracle stored procedures. TCP/IP and
LU6.2 are supported for connectivity (via Oracle Net). The Oracle Access Manager
for AS/400 is included with the Oracle Enterprise Integration Gateways.
Two-Phase Commits
One of the biggest issues associated with the use of distributed databases is the difficulty
of guaranteeing the same level of data integrity for updates to distributed
databases. Because a transaction that writes data to multiple databases must depend
on a network for the transmission of information, it is inherently more susceptible to
lost information than a single Oracle instance on a single machine.
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