Availability Guide for Change Management

Making Application Subsystem Changes Online
Availability Guide for Change Management–125506
4-22
Making Changes to Transaction-Processing
Monitoring Environments Online
Making Changes to Transaction-Processing
Monitoring Environments Online
Although originally developed to optimize the performance and availability of OLTP
applications running on mainframe systems, transaction-processing (TP) monitors
perform the same functions for client/server OLTP applications. A TP monitor can
include services for screen presentation and management, data management and
conversion, network access, authorization and security, and restart and recovery for the
applications and resources under its control.
TP monitors also serve to optimize database performance. The TP monitor routes the
client request for services to the appropriate server process. The server process acts as a
“client” to the database on behalf of the clients it is servicing. By supporting a distinct
application service layer independent of the database, the TP monitor enables the
database to focus on data shipping, data integrity, and data management.
Tandem supports the following TP monitoring environments:
•
The NonStop TUXEDO environment
•
The Pathway environment
This subsection:
•
Provides an overview of each of the TP monitoring environments
•
Describes the changes you can make to each of the TP monitoring environments
online
The NonStop TUXEDO Environment
The NonStop TUXEDO environment provides a client/server model for open
applications and the benefits of the Tandem fundamentals. The NonStop TUXEDO
product is Tandem’s implementation of Novell, Inc.’s TUXEDO enterprise-transaction-
processing (ETP) system, a transaction monitor for open client/server applications. The
NonStop TUXEDO system provides the System/T transaction-monitor functions, the
API familiar to all TUXEDO application developers, and the administrative interface
familiar to all TUXEDO system administrators. Figure 4-5 provides an overview of a
NonStop TUXEDO transaction-processing environment.
Note. For a more complete description of the TP monitoring environments, read the
Introduction to NonStop Transaction Processing.