Fast Ethernet Adapter Installation and Support Guide

Glossary
Fast Ethernet Adapter Installation and Support Guide—425685-003
Glossary-41
hertz (Hz)
In an Open System Services (OSS) program, a header is the name of a file known to
the run-time library used by a process. In a Guardian environment C language
program, a header is the file identifier for a file known to the run-time library used by a
process.
hertz (Hz). A unit of frequency. One hertz equals one cycle/second.
high frequency. A Federal Communications Commission (FCC) designation for a
frequency in the range 30 through 300 megahertz, corresponding to a decametric
wave in the range 10 through 100 meters.
high PIN. A process identification number (PIN) that is greater than 255. Contrast with low
PIN.
hop count. The number of routers that form a route between a ServerNet source and
ServerNet destination. Hop count is used to determine the best route. If two alternate
routes have the same time factor, the path with the lower hop count is the better route.
host database. An SQL database maintained for the host system and containing
information about requests, software inputs, snapshots, targets, and profiles.
host system. (1) A computer system that supports very large databases and does batch
processing, usually for an entire network of smaller systems. (2) The central site on
which the Distributed Systems Management/Software Configuration Manager
(DSM/SCM) is managed, the Archive is maintained, and configuration revisions are
built. The host system is also a target system.
HP NonStop™ Cluster Switch. An assembly that routes ServerNet messages across an
external fabric of a ServerNet cluster. The cluster switch consists of a ServerNet II
Switch, an uninterruptible power supply (UPS), and an AC transfer switch, and it can
be packaged in a switch enclosure or in a 19-inch rack.
HP NonStop™ Kernel Open System Services (OSS). The product name for the OSS
environment. See also Open System Services (OSS)
.
HP NonStop™ Kernel operating system. The operating system for HP NonStop systems.
HP NonStop™ Kernel user ID. A user ID within an HP NonStop system. The Guardian
environment normally uses the structured view of this user ID, which consists of either
the group-number, user-number pair of values or the group-name.user-name
pair of values. For example, the structured view of the super ID is (255, 255). The
Open System Services (OSS) environment normally uses the scalar view of this user
ID, also known as the UID, which is the value (group-number * 256)
+ user-number. For example, the scalar view of the super ID is (255 * 256) + 255
= 65535.
HP NonStop™ K-series servers. The set of servers in the HP NonStop servers having
product numbers beginning with the letter K. These servers run the HP NonStop
Kernel operating system, but they do not implement the ServerNet architecture.