Availability Guide for Change Management

Glossary
Availability Guide for Change Management–125506
Glossary-7
online transaction processing (OLTP)
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.
Open System Services (OSS). An open system environment available for interactive or
programmatic use with the Tandem NonStop Kernel. Processes that run in the OSS
environment use the OSS application program interface; interactive users of the OSS
environment use the OSS shell for their command interpreter.
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
categorizes operations-management functions into the following disciplines: production
management, problem management, change management, configuration management,
security management, and performance management.
operations outage class. An outage class that includes errors caused by operations personnel
due to accidents, inexperience, or malice.
OSCONFIG file. A file that contains Software Problem Isolation and Fix Facility (SPIFF)
and Software ID (SWID) records.
OSIMAGE file. A file that contains a complete image of the operating system. The
OSIMAGE file is created by SYSGEN.
OSS. See Open System Services (OSS).
outage. Time during which the NonStop system is not capable of doing useful work because
of a planned or unplanned outage. From the end user’s perspective, an outage is any
time the application is not available.
outage class. A concept developed by Tandem to categorize the causes of outages. There are
five outage classes: physical, design, operations, environmental, and reconfiguration.
The first four categories describe unplanned outages. The reconfiguration outage class
includes all planned outages.
outage minutes. A metric recommended by Tandem for measuring outages that translates
percentages into minutes of downtime per year.
overflow audit volume. A disk volume on the local system used to store audit-trail files
when the active audit trail becomes too full.