ServerNet Cluster 6780 Planning and Installation Guide (G06.24+, H06.03+)

Glossary
ServerNet Cluster 6780 Planning and Installation Guide—527301-004
Glossary-18
online
online. Used to describe tasks that can be performed while the HP NonStop™ operating
system and system utilities are operational. Contrast with offline.
operator message. A message, intended for an operator, that describes a significant event
on an HP NonStop™ server. An operator message is the displayed-text form of an
Event Management Service (EMS) event message.
OSM Event Viewer. A component of the OSM software. The OSM Event Viewer lets you
set up criteria to view Event Management Service (EMS) log files in several ways,
enabling you to rapidly assess service problems.
OSM Low-Level Link. A connection between the software running on a system console
and the master service processors (MSPs) on a NonStop S-series server. When the
HP NonStop™ operating system is not running, communication must take place over
the OSM Low-Level Link. You can also communicate with a server over an OSM
Low-Level Link when the operating system is running. See also OSM Service
Connection.
OSM Service Connection. A component of the OSM software package. The OSM Service
Connection enables you to communicate with a NonStop S-series server when the HP
NonStop™ operating system is running. When the operating system is not running,
communication must take place using the OSM Low-Level Link.
packet. A block of information that contains fields for addressing, sequencing of information,
possible priority indicators, and a portion of a message or an entire message. See also
ServerNet packet.
path. The route between a processor and a subsystem. If a subsystem is configured for
fault tolerance, it has a primary path (from the primary processor) and a backup path
(from the backup processor).
peer fabric. The fabric on which an operation is not taking place. The X and Y fabrics are
peers. If an action is being performed on one fabric, the other fabric is the peer fabric.
persistence. For the Subsystem Control Facility (SCF), the capability of a generic process
to restart automatically if it was stopped abnormally. You configure this capability by
specifying a nonzero AUTORESTART value in an ADD command.
persistence count. The number of times the $ZPM persistence manager process will
restart a generic process that has been terminated abnormally. A generic process with
an AUTORESTART value of 10 (the maximum) is said to have a persistence count of
10. See also persistence.
persistence manager process. The $ZPM process that is started and managed by the
$ZCNF configuration utility process and that starts generic processes and manages
their persistence.