Availability Guide for Application Design

Glossary
Availability Guide for Application Design—525637-004
Glossary-16
object
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.
object state. In DSM, the current condition of an object that indicates its readiness to do
work.
odd state. The condition of an object that is still capable of providing service but can either
provide only partial service, or has crossed some usage threshold indicating that it
might soon be unable to provide service. A critical object that transitions to the odd
state implies the need for corrective action. See also up state, down state, and
unknown state.
offline. Term used to describe tasks that require the NonStop system to be shut down.
OLTP. See online transaction processing (OLTP).
OMF. See HP Object Monitoring Facility (OMF).
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.
Open System Services (OSS). An open system environment available for interactive or
programmatic use with the HP NonStop operating system. 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. See also Guardian
application program interface (Guardian API).