TS/MP System Management Manual (H06.05+, J06.03+)

Introduction to NonStop TS/MP System
Management
HP NonStop TS/MP System Management Manual—541819-007
1-11
PATHCOM Processes
start up and shut down the PATHMON-controlled objects, and obtain status information
about the PATHMON environment. For information on the attributes that affect the
PATHWAY object, see Starting and Stopping a PATHMON Environment on page 2-1.
PATHCOM Processes
You can use PATHCOM at a command terminal to communicate interactively with the
PATHMON process. Other users use PATHCOM at application terminals to start and
run Pathway applications. Multiple PATHCOM processes can communicate with a
single PATHMON process concurrently, each supporting a particular user.
SERVER Objects
The SERVER object represents a server class, which is a group of server processes
that perform a specific type of application work (for example, adding customer names
and addresses, calculating invoice totals, or checking inventory).
The PATHMON process controls two types of server classes: Guardian server classes
residing in the Guardian environment and OSS server classes residing in the OSS
environment. In general, Guardian server processes respond to requests from
SCREEN COBOL and Pathsend requesters, and OSS server processes respond to
requests from OSS processes such as NonStop TUXEDO clients. If required,
however, processes in the OSS environment can be coded to send requests to
Guardian server processes; and SCREEN COBOL and Pathsend requesters can send
requests to OSS server processes.
The Pathway translation server for the NonStop TUXEDO system is a special-purpose
OSS server that enables SCREEN COBOL requesters to access NonStop TUXEDO
application services. For more information about this translation server, see the
Pathway Translation Server for the NonStop TUXEDO System Manual.
All processes within a server class run copies of the same server program, which
means that all processes within a server class provide the same set of functions. This
replication of server-class function allows you to distribute the transaction workload
across multiple CPUs in a system.
The number of server processes configured in a server class can vary. It is usually
determined by application response-time requirements and the transaction workload.
The PATHMON process can start additional server processes during peak workloads
to maintain acceptable throughput.
LINKMON Processes
A LINKMON process is a multitasking process that handles the interface to server
processes from requesters other than SCREEN COBOL and TUXEDO requesters.
Such requesters include Pathsend requesters; workstation clients that use RSC and,
optionally, POET.
Each processor in a system has one LINKMON process, which starts when the
processor starts. The LINKMON process is shared by all Pathsend requesters running