Veritas Storage Foundation™ for Oracle 5.0.1 Administrator's Guide

gigabyte A measure of memory or storage. A gigabyte is approximately 1,000,000,000 bytes
(technically, 2 to the 30th power, or 1,073,741,824 bytes). Also GB, Gbyte, and
G-byte.
HFS High Performance File System. The HP-UX name for the file system derived from
the 4.2 Berkeley Fast File System.
high availability (HA) The ability of a system to perform its function continuously (without significant
interruption) for a significantly longer period of time than the combined
reliabilities of its individual components. High availability is most often achieved
through failure tolerance and inclusion of redundancy; from redundant disk to
systems, networks, and entire sites.
hot backup The process of backing up a database that is online and in active use.
hot pluggable To pull a component out of a system and plug in a new one while the power is still
on and the unit is still operating. Redundant systems can be designed to swap disk
drives, circuit boards, power supplies, CPUs, or virtually anything else that is
duplexed within the computer. Also known as hot swappable.
inode list An inode is an on-disk data structure in the file system that defines everything
about the file, except its name. Inodes contain information such as user and group
ownership, access mode (permissions), access time, file size, file type, and the
block map for the data contents of the file. Each inode is identified by a unique
inode number in the file system where it resides. The inode number is used to find
the inode in the inode list for the file system. The inode list is a series of inodes.
There is one inode in the list for every file in the file system.
instance When you start a database, a system global area (SGA) is allocated and the Oracle
processes are started. The SGA is the area of memory used for database
information shared by all database users. The Oracle processes and the SGA create
what is called an Oracle instance.
intent logging A logging scheme that records pending changes to a file system structure. These
changes are recorded in an intent log.
interrupt key A way to end or break out of any operation and return to the system prompt by
pressing Ctrl-C.
JFS Journaled File System, the HP-UX name for a light version of the Veritas File
System that includes only the journaling feature.
kilobyte A measure of memory or storage. A kilobyte is approximately a thousand bytes
(technically, 2 to the 10th power, or 1,024 bytes). Also KB, Kbyte, kbyte, and K-byte.
large file A file more than two gigabytes in size. An operating system that uses a 32-bit
signed integer to address file contents will not support large files; however, the
Version 4 disk layout feature of VxFS supports file sizes of up to two terabytes.
405Glossary