Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

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.
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.
large file system A file system more than two gigabytes in size. VxFS, in conjunction with VxVM,
supports large file systems.
latency The amount of time it takes for a given piece of work to be completed. For file
systems, this typically refers to the amount of time it takes a given file system
operation to return to the user. Also commonly used to describe disk seek times.
load balancing The tuning of a computer system, network tuning, or disk subsystem in order to
more evenly distribute the data and/or processing across available resources. For
example, in clustering, load balancing might distribute the incoming transactions
evenly to all servers, or it might redirect them to the next available server.
load sharing The division of a task among several components without any attempt to equalize
each component’s share of the load. When several components are load sharing,
it is possible for some of the shared components to be operating at full capacity
and limiting performance, while others components are under utilized.
LUN (logical unit
number)
A method of expanding the number of SCSI devices that can be placed on one SCSI
bus. Logical Unit Numbers address up to seven devices at each SCSI ID on an 8-bit
bus or up to 15 devices at each ID on a 16-bit bus.
logical volume See volume.
logical unit number See LUN.
master node A computer which controls another computer or a peripheral.
539Glossary