Event Correlation - HP -UX B6941-90001 Administrator's Reference Manual

The default configuration for loading and unloading DLLs can be
changed by adding the following parameters to the
\opt\OV\bin\OpC\install\opcinfo file on the OS/2 managed node:
• OPC_OS2_MAX_NBR_LOADED_DLLS
Specifies the maximum number of DLL that can be loaded
simultaneously. The default value is 10 and should be sufficient for
most installations.
• OPC_OS2_EXTERN_DLL_TIMEOUT
Specifies the timeout in seconds after which an unused DLL is
unloaded. The default is 180 seconds (3 minutes). If this parameter is
set to 0, the DLL is never unloaded. This is not recommended because
while a DLL is loaded in active memory, new versions cannot be
distributed from the management server. If frequent distributions are
required, it is recommended that the value of this parameter is set to
a value lower than 10 seconds.
User-supplied REXX Scripts on OS/2 Managed Nodes
REXX is the default scripting language in OS/2. REXX scripts can, for
example, be used as external monitors or as actions. Note that REXX
command must be delimited by a semicolon or by a CR/LF. If
user-supplied scripts do not conform to these rules, the actions are not
executed successfully.
The ITO action agent does not exit until all running actions have
completed. Therefore, REXX scripts or executables must not run in an
endless loop. Use the option DETACH if an endless script or executable is
required. DETACH places a program in the background and returns the
command to the script immediately.

Event Correlation

ITO' event-correlation runtime engine is available for both the ITO
management server and the ITO agent and currently runs on the
platforms listed in Table 5-12. For more information on the concepts
behind event correlation as well as the way it works in ITO, see the HP
OpenView IT/Operations Concepts Guide. For help in setting up event
correlation in ITO, see the section on tasks in the HP ITO
Administrator's Guide to Online Information.
Chapter 5
Configuring ITO
Preconfigured Elements
235