Pathway/XM System Management Manual

Managing a Pathway/XM Environment
Compaq NonStop™ Pathway/XM System Management Manual—426761-001
7-21
Making Temporary Online Adjustments to a
Pathway/XM Environment
7. Pathway/XM is successfully migrated to the new configuration when all the PLAN
objects are successfully completed.
If not all the plans are successful, use STATUS PLAN to diagnose the problem. Fix
any error and reissue the START PLAN * command.
8. Start the TCP, TERM, and SERVER CLASS objects.
Making Temporary Online Adjustments to a
Pathway/XM Environment
In response to your changing application requirements, you might need to perform one
or more of the following tasks:
•
Redirect error logging to a different location
•
Redefine CPU resources in NODE objects
•
Turn error dumping on or off for the PATHMON processes
•
Turn statistics collection or error dumping on or off for a selected set of TCPs
•
Assign or change a device or process name for a terminal
•
Change configuration parameters of a distributed server class online
For example, if a processor failure has occurred in your system, you might want to
redefine the CPU resources defined by a client NODE object in order to temporarily
rebalance the workload. (When a CPU fails, Pathway/XM automatically rebalances the
workload by distributing it among the remaining processors specified for the NODE
object; you can use the CONTROL NODE command to change this distribution.)
Directing error logging to a different location by using the LOG1 and LOG2 commands
has already been described, in Specifying the Location for Message Logging
on
page 7-9. The following subsections describe how to redefine CPU resources in NODE
objects by using the CONTROL NODE command, and how to enable or disable
PATHMON error dumping by using the CONTROL PATHMON command.
Enabling and disabling statistics collection and error dumping for TCPs, done through
the CONTROL TCP command, is described in Enabling and Disabling TCP Dumping
and Statistics Collection on page 8-6. Assigning or changing terminal device or process
names, done through the CONTROL TERM command, is described in Assigning or
Changing Terminal Device or Process Names on page 8-6. Online reconfiguration of
distributed server classes, done through the CONTROL SERVER command after
suspending the server class, is described in Reconfiguring Distributed Server Classes
Online on page 9-5.
The permanence of these changes varies depending on the command. Table 7-1
summarizes the commands for making online configuration changes and identifies
which ones are preserved through cold start, cool start, and warm start of the
Pathway/XM environment.