HP JFS 3.3 and HP OnLineJFS 3.3 VERITAS File System 3.3 System Administrator's Guide

159
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
inodes used by each user. See quotas and external quotas file .
K Kilobyte (210 bytes or 1024 bytes).
large file A file larger than two gigabytes. VxFS supports files up to
one terabyte in size.
large file system A file system more than two gigabytes in size. VxFS
supports file systems up to one terabyte 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.
metadata Structural data describing the attributes of files on a disk.
MB Megabyte (2
20
bytes or 1024 kilobytes).
object location table (OLT) The information needed to locate
important file system structural elements. The OLT is written to a fixed
location on the underlying media (or disk).
object location table replica A copy of the OLT in case of data
corruption. The OLT replica is written to a fixed location on the
underlying media (or disk).
page file A fixed-size block of virtual address space that can be mapped