TS/MP 2.5 System Management Manual

ACS Subsystem Processes
An ACS subsystem process is a multitasking process that handles the interface to server processes
from requestors other than SCREEN COBOL and TUXEDO requestors. Such requestors include
Pathsend requestors; workstation clients that use RSC and, optionally, POET.
Each processor in a system has one ACS subsystem process, which starts when the processor starts.
The ACS subsystem process is shared by all Pathsend requestors running in a given processor.
ACS subsystem processes function as link managers, providing link management functions for
Pathsend requestors in the way that the TCP and the PATHMON process provide those functions
for SCREEN COBOL requestors.
NOTE: Although ACS subsystem processes are visible to the PATHMON process, they are not
entities controlled or managed by the PATHMON process. For more information about the process
and Pathsend requestors, see “Managing the Pathsend Environment” (page 109).
Transaction Sources
A variety of devices and processes might interact with the PATHMON process and objects to
supply required resources and services or to make requests. These include PATHCOM or a
management application process (described in “System Management Tools” (page 29)), as well
as terminals controlled by TCP objects. In addition, these devices and processes might include:
• Personal computers and workstations (using the Remote Server Call (RSC) product).
• External TCP objects, that is, Pathway/iTS terminals running outside of your PATHMON
environment.
• Intelligent devices such as an automated teller machine (using intelligent device support (IDS).
• SNA devices (using the SNAX High-Level Support (SNAX/HLS) product).
• Unsupported or special-function I/O devices (using the Extended General Device Support
(GDSX) product).
• Pathsend processes (using Pathsend procedure calls to communicate with the ACS subsystem
processes).
Figure 5 (page 25) shows devices that interact with PATHMON-controlled objects, either directly
or through the ACS subsystem processes.
24 Introduction to NonStop TS/MP System Management