Availability Guide for Change Management

Making Application Subsystem Changes Online
Availability Guide for Change Management–125506
4-2
The Transaction-Processing Application
Environments
•
The Tandem NonStop Kernel, the operating system that provides low-level functions
such as interprocess message management, file management, memory management,
and so on. The operating system provides two operating environments:
•
Open System Services (OSS) environment
•
Guardian environment
•
A device and transaction control system that supports complex applications in a
network environment. This function is performed by the NonStop TS/MP product,
which provides services such as process management and link management for
transaction-processing applications.
•
A relational-database-management system that supports high-speed access and
updates to distributed data. This function is performed by the NonStop SQL/MP
database-management system.
•
A transaction-management facility that preserves the integrity of data during the
multiple, concurrent transactions that change the data. This function is performed
by NonStop TM/MP.
The Transaction-Processing Application Environments
An application can run in one of the following environments:
•
The NonStop TUXEDO environment, Tandem’s implementation of Novell, Inc.’s
TUXEDO enterprise transaction-processing (ETP) system, a transaction monitor for
open client/server applications.
•
The Pathway transaction-processing environment, an implementation of the
client/server model for terminal-based and workstation-based applications.