Veritas File System 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Glossary
node abort
Glossary 239
I
indirect address extent An extent that contains
references to other extents, as opposed to file data
itself. A single indirect address extent references
indirect data extents. A double indirect address
extent references single indirect address extents.
indirect data extent An extent that contains file
data and is referenced via an indirect address extent.
inode A unique identifier for each file within a file
system that contains the data and metadata
associated with that file.
inode allocation unit A group of consecutive
blocks containing inode allocation information for a
given fileset.
This information is in the form of a resource
summary and a free inode map.
intent logging A method of recording pending
changes to the file system structure. These changes
are recorded in a circular intent log file.
internal quotas file VxFS maintains an internal
quotas file for its internal usage. The internal quotas
file maintains counts of blocks and indices used by
each user. See also quotas and external quotas
file.
K
Kilobyte Kilobyte (210 bytes or 1024 bytes).
L
large file A file larger than two terabytes. VxFS
supports files up to 8 exabytes in size.
large file system A file system larger than two
terabytes. VxFS supports file systems up to 8
hexabytes in size.
latency For file systems, this typically refers to the
amount of time it takes a given file system
operation to return to the user.
local mounted file system A file system mounted
on a single host. The single host mediates all file
system writes to storage from other clients. To be a
local mount, a file system cannot be mounted using
the mount -o cluster option. See also cluster
mounted file system.
M
metadata Structural data describing the attributes
of files on a disk.
MB Megabyte (220 bytes or 1024 kilobytes).
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.
multi-volume file system A single file system that
has been created over multiple volumes, with each
volume having its own properties.
MVS Multi-volume support.
N
node One of the hosts in a cluster.
node abort A situation where a node leaves a
cluster (on an emergency basis) without attempting
to stop ongoing operations.