Expand Configuration and Management Manual (G06.24+)

Glossary
Expand Configuration and Management Manual—523347-008
Glossary-14
object
object. (1) One or more of the devices, lines, processes, and files in an HP subsystem; any
entity subject to independent reference or control by one or more subsystems. (2) In
SCF, a resource controlled by an SCF subsystem. SCF objects include processes,
disks, disk files, and data communications lines. Each object has an object type and an
object name. See also object name and object type.
object attribute. See attribute.
object name. A name that uniquely identifies each SCF object within an SCF subsystem.
object state. See state.
object type. A category of SCF objects to which a specific object belongs. There are four
Expand SCF object types: PROCESS, PATH, LINE, and ENTRY.
Open Systems Interconnection (OSI). A seven-layer network-architecture model defined
by the International Organization for Standardization (ISO). The two lower layers deal
with the physical connections and their protocols. The five upper layers deal with
network services, such as network file transfers and accessing remote databases.
operator message. A message, intended for an operator, that describes a significant event
on a NonStop server. An operator message is the displayed-text form of an Event
Management Service (EMS) event message. See also event message.
OSI. See Open Systems Interconnection (OSI).
out-of-sequence (OOS) buffer. A portion of the Expand line-handler process data space
used to buffer packets that are received out of sequence by the Expand line-handler
process. Expand allocates 32767 words to the OOS buffer. See also out-of-sequence
(OOS) packets.
out-of-sequence (OOS) packets. Packets that are destined for a process at the local
system but that are not received in the same order in which they were sent.
packet. A block of information that contains fields for addressing, sequencing of information,
priority indicators, and a portion of a message or an entire message. See also Expand
frame.
packet header. The portion of an Expand frame that contains control information added by
the Expand line-handler process. By default, D20 and later Expand frames use an
extended packet header format of 64 bytes.
passive connect request. A connect method that may be used by an Expand line-handler
process when it attempts to establish an end-to-end connection. When an Expand-
over-NAM line-handler process issues a passive connect request, the network access
method (NAM) waits for an incoming connect request. When an Expand-over-IP or
Expand-over-ATM line-handler process issues a passive connect request, it waits for
an incoming Connect Command frame from the remote Expand-over-IP or Expand-