Open System Services Installation Guide (G06.24+, H06.03+, J06.03+)

Glossary
Open System Services Installation Guide—429954-004
Glossary-2
DSM/SCM
new NonStop operating system. DSM/SCM creates a new software revision and
activates the new software on the target system.
DSM/SCM. See Distributed Systems Management/Software Configuration Manager
(DSM/SCM).
EDIT file. In the Guardian file system, an unstructured file with file code 101. An EDIT file
can be processed by either the EDIT or PS Text Edit (TEDIT) editor. An EDIT file
typically contains source program or script code, documentation, or program output.
OSS functions can open an EDIT file only for reading.
Expand network. The operating system network that extends the concept of fault-tolerant
operation to networks of geographically distributed NonStop S-series systems. If the
network is properly designed, communication paths are constantly available even if a
single line failure or component failure occurs.
Expand node. A system in an Expand network. See also node.
FIFO. A type of OSS special file that is always read and written in a first-in, first-out manner.
file. An object to which data can be written or from which data can be read. A file has
attributes such as access permissions and a file type. In the OSS environment, file
types include regular file, character special file, block special file, FIFO, and directory.
In the Guardian environment, file types include disk files, processes, and subdevices.
filename. In the OSS environment, a component of a pathname containing any valid
characters other than slash (/) or null. See also file name.
file name. A string of characters that uniquely identifies a file.
In the PC environment, file names for disk files normally have at least two parts (the
disk name and the file name); for example, B:MYFILE.
In the Guardian environment, disk file names include a node name, volume name,
subvolume name, and file identifier; for example, \NODE.$DISK.SUBVOL.MYFILE.
In the OSS environment, a file is identified by a pathname; for example,
/usr/john/workfile. See also filename.
fileset. In the OSS environment, a set of files with a common mount point within the file
hierarchy. A fileset can be part or all of a single virtual file system.
On a NonStop system, the Guardian file system for a node has a mount point and is a
subset of the OSS virtual file system. The entire Guardian file system therefore could
be viewed as a single fileset. However, each volume, and each process of subtype 30,
within the Guardian file system is actually a separate fileset.
The term file system is often used interchangeably with fileset in UNIX publications.
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. OSS