Open System Services Management and Operations Guide (G06.25+, H06.03+)

Operating the OSS Environment

Open System Services Management and Operations Guide—527191-002

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Making OSS Application Processes Persistent with

the Kernel Subsystem

Making OSS Application Processes Persistent with the Kernel

Subsystem

Just as the OSS Monitor can be made a persistent process using the SCF interface to

the NonStop Kernel subsystem, the same SCF interface provides commands to

configure, start, and stop OSS application processes that are persistent. A persistent

process is automatically started when certain criteria are met and then automatically

restarted if events make the original copy of the process unavailable. Such processes

are called generic processes in SCF documentation. This subsection provides

suggestions for possible uses of this facility; for a complete description of the

commands, process attributes, and parameters, see the SCF Reference Manual for

the Kernel Subsystem.

Generic OSS processes have the following characteristics:

•

Both shell scripts and compiled programs can be made persistent.

•

Each OSS process is started by configuring a copy of the Guardian OSH utility to

start it.

•

Each process has the following configurable attributes under the persistence

manager (attributes are the same as for a Guardian generic process):

AUTORESTART

CPU – Applies to names used for both NAME and ASSOCPROC attributes

HOMETERM – Always the terminal used by the TACL for the ADD command

MEMPAGES

NAME – Always identifies a copy of OSH

PRIMARYCPU

PRIORITY – Always use the default priority

PROGRAM – Always specifies $SYSTEM.SYSTEM.OSH

SAVEABEND

STARTMODE – Always must be MANUAL

STOPMODE

TYPE

STARTUPMSG – Specifies a string of up to 128 characters to pass to OSH

USERID

•

As an alternative to specifying the HOMETERM attribute, you can use OSS shell

input/output redirection at the end of the STARTUPMSG value. For example:

STARTUPMSG "... <- >>out 2>>err"

The appended information is interpreted by the OSS shell as follows:

closes standard input