Introduction to NonStop Operations Management

Operations Management Tools
Introduction to NonStop Operations Management–125507
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NonStop Virtual Hometerm Subsystem (VHS)
NonStop Virtual Hometerm Subsystem (VHS)
VHS acts as a virtual home terminal for applications by emulating a 6530 terminal. VHS
receives messages normally sent to the home terminal, such as displays and application
prompts, and uses these messages to generate event messages to EMS to inform
operations staff of problems. Processes that enter Debug or Inspect are automatically
handled by VHS are stopped, then are restarted to an operational state by the application
monitor process.
VHS emulates a terminal, but does not have the disadvantages of a single, dedicated
physical terminal because you can:
•
Easily access critical application messages
•
Centralize message handling
•
Free up physical terminals
NSKCOM
NSKCOM, a NonStop Kernel utility program, is the NonStop Kernel command interface
to the Kernel-Managed Swap Facility (KMSF). NSKCOM is the primary tool for
monitoring, configuring, and managing kernel-managed swap files. Kernel-managed
swapping is a method for managing virtual memory using swap files controlled by the
NonStop Kernel: each processor has at least one kernel-managed swap file that provides
the swap space needed by all the processes running on that processor. Proper
configuration and management of kernel-managed swap space is critical to the operation
of your system.
Using NSKCOM, you can review your kernel-managed swap configuration, check your
kernel-managed swap files to ensure that they are running properly and that their usage
is at an acceptable level, and alter your swap files. Use NKSCOM to:
•
Display dynamic statistics on swap files, including information on the available and
reserved memory pages, the threshold at which the kernel-managed swap facility
generates an event messages for the file, and the peak pages ever reserved for the
file.
•
Display static configuration information and file attributes for swap files.
•
Alter your kernel-managed swap configuration as necessary to ensure proper system
performance. Use NSKCOM to resize swap files, add and delete swap files, and
change the threshold at which EMS messages are generated.
Object Monitoring Facility (OMF)
OMF is a console application that monitors objects on the system automatically. OMF
notifies you when thresholds are reached (files filling up, the spooler filling up,
processes going away, processors too busy, disks too full, and so on). This proactive
monitoring of the system can improve overall availability by preventing potential
problems.