US Robotics 7931 Betriebsanweisung PDF herunterladen (Seite 271)

Glossary 247

indirect block A disk block that contains a list of storage blocks. File systems have up to three

levels of indirect blocks. A first-level indirect block contains a list of blocks

used for data storage. A second-level indirect block contains a list of first-level

indirect blocks. A third-level indirect block contains a list of second-level

indirect blocks.

inode Index node. A data structure used by the file system to describe a file. An

inode describes all the attributes associated with a file other than the name.

The attributes include ownership, access, permission, size, and the file location

on the disk system.

inode file A special file (.inodes) on the file system that contains the inode structures

for all files resident in the file system. Inodes are 512 bytes long. The inode file

is a metadata file, which is separated from file data in the file system.

kernel The central controlling program that provides basic system facilities. The UNIX

kernel creates and manages processes, provides functions to access the file

system, provides general security, and supplies communication facilities.

LAN Local area network.

lease A function that grants a client host permission to perform an operation on a

file for a specified period of time. The metadata server issues leases to each

client host. The leases are renewed as necessary to permit continued file

operations.

library See automated library.

library catalog See catalog.

local file system A file system that is installed on one node of a Sun Cluster system and is not

made highly available to another node. Also, a file system that is installed on a

server.

LUN Logical unit number.

1 2 ... 266 267 268 269 270 271 272 273 274 275 276 ... 287 288

Keine Kommentare

US Robotics 7931 Betriebsanweisung Seite 271