TS/MP Management Programming Manual (G06.24+, H06.03+)

Introduction

NonStop TS/MP Management Programming Manual—540082-001

1-2

Architecture and Components

The Pathway subsystem includes a group of related software tools that enable your

organization to develop, install, and manage online transaction processing

applications.

Transaction processing applications consist of two types of programs: requester

programs (called clients in other environments) and server programs. Among other

benefits, the requester/server design allows application logic to be distributed near the

resources it manages. For example, presentation services are located in requester

programs near the I/O devices; database logic resides in server programs near the

database. Requesters and servers communicate using the message system provided

by the NonStop operating system.

Link managers (such as LINKMON processes and Pathway/iTS terminal control

processes (TCPs)) coordinate the sharing of links between requesters and server

processes. The PATHMON process, in addition to creating, configuring, and globally

managing server classes, grants links to link managers that request access to server

processes.

Figure 1-1 on page 1-3 shows a simple TS/MP application that uses Pathway/iTS. This

example shows the TCP and the PATHMON process managing communications

between Guardian requesters and servers.

Note. Although LINKMON processes are visible to the PATHMON process and are part of the

Pathway subsystem, they are not controlled or managed by the PATHMON process. They are,

however, treated as external TCPs by the PATHMON process that processes link requests.

For more information about LINKMON processes, see the TS/MP System Management

Manual. For more information about TCPs, see the Pathway/iTS System Management Manual.