VERITAS Storage Foundation 4.1 Oracle Administrator's Guide

Glossary 529
Prerelease 8 September 2005, 8:55am
mirror
A duplicate copy of a volume and the data therein (in the form of an ordered collection of
subdisks). Each mirror is one copy of the volume with which the mirror is associated.
The terms mirror and plex can be used synonymously.
mirroring
A layout technique that mirrors the contents of a volume onto multiple plexes. Each plex duplicates
the data stored on the volume, but the plexes themselves may have different layouts.
mount point
The directory path name at which a file system attaches to the file system hierarchy.
multithreaded
Having multiple concurrent or pseudo-concurrent execution sequences. Used to describe processes
in computer systems. Multithreaded processes are one means by which I/O request-intensive
applications can use independent access to volumes and disk arrays to increase I/O performance.
NBU
See “VERITAS NetBackup (NBU).”
node
One of the hosts in a cluster.
object (VxVM)
An entity that is defined to and recognized internally by the VERITAS Volume Manager. The
VxVM objects include volumes, plexes, subdisks, disks, and disk groups. There are two types of
VxVM disk objects—one for the physical aspect of the disk and the other for the logical aspect of
the disk.
OLTP
See “Online Transaction Processing.”
online administration
An administrative feature that allows configuration changes without system or database down time.
OnlineJFS
The HP-UX name for the advanced Online Journaled File System, the full-featured version of the
VERITAS File System.