Availability Guide for Problem Management

Glossary
Availability Guide for Problem Management–125509
Glossary-5
NonStop Virtual Hometerm Subsystem (VHS)
NonStop Virtual Hometerm Subsystem (VHS). A subsystem that acts as a virtual home
terminal for applications by emulating a 6530 terminal. NonStop VHS receives
messages normally sent to the home terminal, such as displays and application prompts,
and uses these messages to generate event messages for EMS, which can in turn be used
to inform operations staff of problems.
NSX. See Network Statistics Extended (NSX).
object. Any entity subject to independent reference or control by one or more subsystems.
Examples of objects are devices, communications lines, processes, and files. In
Distributed Systems Management (DSM), every object has a name and type.
offline. Used to describe tasks that require the NonStop system to be shut down.
OMF. See Tandem Object Monitoring Facility (OMF).
OM model. See operations-management model.
online. Used to describe tasks that can be performed while the NonStop system is
operational.
online change. Any change that can be performed while your NonStop system is still
operational. In some situations, online changes may temporarily affect application
availability. For example, altering the characteristics of a communications line may
temporarily affect applications that use that communications line.
online dump. A copy of an audited disk volume written to a tape or disk. The TMF
subsystem can restore the online dump files to disk and apply the audit trail images to
reconstruct the files on the volume.
online transaction processing (OLTP). A method of processing transactions in which
entered transactions are immediately applied to the database. The information within
the database is readily available to all users through online screens and printed reports.
online transaction processing application. A set of programs that perform online
transaction processing (OLTP) tasks on behalf of the user. With an OLTP application,
many terminal users can update data simultaneously, recording the changes in the
database as they are entered. OLTP applications generally display, check, and accept
input data, manipulate the input data, and perform some type of data output activity.
operations management (OM). The operation and management of systems and networks in
support of your business. Planning for operations management includes establishing
and fulfilling service-level agreements, defining and understanding the OM model, and
optimizing the features of Tandem systems and software.
operations-management (OM) model. A model for managing NonStop systems that
categories operations management functions into the following disciplines: production
management, problem management, change management, configuration management,
security management, and performance management.