Open System Services NFS SCF Reference Manual

Glossary
Open System Services NFS SCF Reference Manual—522582-001
Glossary-5
file system
file system. In the OSS environment, a collection of files and file attributes. A file system
provides the namespace for the file serial numbers that uniquely identify its files. Open
System Services provides a file system (see also ISO/IEC IS 9945-1:1990 [ANSI/IEEE
Std. 1003.1-1990], Clause 2.2.2.38); the Guardian environment provides a file system;
and OSS NFS provides a file system. (OSS NFS filenames and pathnames are governed
by slightly different rules than OSS filenames and pathnames.) Within the OSS and OSS
NFS file systems, filesets exist as manageable objects.
On a Himalaya system, the Guardian file system for a node is a subset of the OSS virtual
file system. Traditionally, the application program interface (API) for file access in the
Guardian environment is referred to as the “Guardian file system.”
In some UNIX and NFS implementations, the term “file system” is used to mean the
same thing as “fileset.” That is, a file system is a logical grouping of files that, except
for the root of the file system, can be contained only by directories within the file
system. See also fileset
.
file transfer protocol (FTP). (1) The Internet-standard, high-level protocol for transferring
files from one system to another. The server side requires the client to supply a logon
identifier and password before it honors requests. FTP makes no assumptions about the
file-naming structure of the source and destination systems, and it allows the file names
of each system to be represented in the vernacular.
(2) The application used to send complete files over Transmission Control
Protocol/Internet Protocol (TCP/IP) services.
FTP. See file transfer protocol (FTP)
.
gateway. A special-purpose, dedicated computer that attaches to two or more networks and
routes packets from one to the other. In particular, an Internet gateway routes Internet
Protocol (IP) datagrams among the networks it is connected to. Gateways route packets
to other gateways until they can be delivered to the final destination.
Gateway-to-Gateway Protocol (GGP). The protocol that core gateways use to exchange
routing information. GGP implements a distributed shortest-path routing algorithm.
Under normal circumstances, all GGP participants reach a steady state in which the
routing information at all gateways agrees.
GGP. See Gateway-to-Gateway Protocol (GGP)
.
Guardian. An environment available for interactive or programmatic use with the Compaq
NonStop Kernel operating system. Processes that run in the Guardian environment use
the Guardian system procedure calls as their application program interface; interactive
users of the Guardian environment use the Compaq Tandem Advanced Command
Language (TACL) or another Compaq product’s command interpreter. Contrast with
Open System Services (OSS)
.
hard link. The relationship between two directory entries for the same file. A hard link acts
as an additional pointer to a file. A hard link cannot be used to point to a file in another
fileset. Compare to symbolic link
.
hardware address. See media access control (MAC) address
.