Availability Guide for Change Management

Tools for Online Change
Availability Guide for Change Management–125506
7-11
Considerations and Limitations of the NonStop
TS/MP and Pathway/TS Management Interfaces
Figure 7-2 shows how PATHCOM and the NonStop TS/MP and Pathway/TS
management programming interface send commands and instructions to PATHMON.
Considerations and Limitations of the NonStop TS/MP and
Pathway/TS Management Interfaces
Section 4, “Making Application Subsystem Changes Online,” describes the changes you
can make to your Pathway environment online, including which types of changes can
affect system and application availability.
PATHCOM Command Example
The following simplified example shows how you would use PATHCOM to delete a
server class from a transaction-processing system.
Step 1: Freeze and Stop the Server
Before deleting a server, you must first freeze and then stop the server. Use the
FREEZE SERVER command to stop requests from being sent to the server class. Use
the STOP SERVER command to stop all server processes in the server class.
The following commands freeze and stop the server class named SALES:
= FREEZE SERVER SALES
= STOP SERVER SALES
Step 2: Delete the Server
Once all the servers in the server class are stopped, you can delete the server class with
the DELETE SERVER command. The following DELETE command deletes the server
class named SALES:
= DELETE SERVER SALES
Figure 7-2. How the Pathway Management Interfaces Work
CDT 011
Command
terminal
Management
Application
Process
PATHMON
NonStop TS/MP and
Pathway/TS
Management
Programming Interface
PATHCOM