HP NonStop NS Recovery Operations for Processes, Supported for the subsystem manager processes

Processes: Monitoring and Recovery							Recovery Operations for Processes
	TFDSHLP	$ZTH13 STOPPED		None		None
	TFDSHLP	$ZTH14 STOPPED		None		None
	TFDSHLP	$ZTH15	STOPPED	None		None		255,255
	ZEXP	$ZEXP	STARTED	0	,13	1	,15
	ZHOME	$ZHOME	STARTED	0	,289	1	,295	255,255
	ZLOG	$ZLOG	STARTED	0	,308	1	,329	255,255
	ZZKRN	$ZZKRN STARTED		0	,293	1	,319	255,255
	ZZLAN	$ZZLAN STARTED		0	,292	1	,297	255,255
	ZZSCL	$ZZSCL STARTED		1	,290	2	,279	255,255
	ZZSMN	$ZZSMN STARTED		1	,289	2	,282	255,255
	ZZSTO	$ZZSTO STARTED		0	,291	1	,320	255,255
	ZZWAN	$ZZWAN STARTED		2	,296	3	,289	255,255

In nearly all circumstances, items that are essential to system operations that must be running at all times restart automatically if they are stopped for any reason while the NonStop Kernel operating system is running.

Some OSM processes stop after executing a macro that runs during system load or during the reload of processor 0 or 1. Those processes include $ZOLHI.

Optionally, you can also configure other processes such as the Expand subsystem manager process, $ZEXP, and the Safeguard monitor process, $ZSMP, as generic processes.

Recovery Operations for Processes

For recovery operations on generic processes, use the SCF interface to the Kernel subsystem and specify the PROCESS object. These SCF commands are available for controlling generic processes:

ABORT	Terminates operation of a generic process. This command is not
	supported for the subsystem manager processes.
START	Initiates the operation of a generic process.

Generic processes that are configured to be persistent usually do not require operator intervention for recovery. In most circumstances, persistent generic processes restart automatically.

For recovery operations on IOPs, refer to the WAN Subsystem Configuration and Management Manual, the SWAN Concentrator and WAN Subsystem Troubleshooting Guide, and the Expand Configuration and Management Manual.

For recovery operations on system processes, refer to the Guardian User’s Guide.

Related Reading

For more information about generic processes and the SCF interface to the Kernel subsystem, refer to the SCF Reference Manual for the Kernel Subsystem.

For more information about IOPs, refer to the WAN Subsystem Configuration and Management Manual, the SWAN Concentrator and WAN Subsystem Troubleshooting Guide, and the Expand Configuration and Management Manual.

HP Integrity NonStop NS-Series Operations Guide—529869-005

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