ADIC Time Clock 6-00028-01 Rev A Manual de usuario descargar pdf (Pagina 53)

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101

Managing the AMASS File System

6-00028-01 Rev A Operational Tasks 2-3

Database and Journal Backups

File System Database—The File System Database contains

tables of attributes—or metadata—representing the directory

structure and media mounted under the AMASS file system.

The metadata includes: media ID, media type, media location,

ownership, and timestamp.

The default location of the Database is in /usr/filesysdb.

The File System Database tells AMASS where data is located

on the media archived in your library (or where data is located

on offline media). The following figure illustrates the concept

of how the Database maps the file system to the volumes in the

library.

Journal—The Journal is a transaction log for the AMASS

Database.

The default location of the Journal is in

/usr/filesysdb/journal. Typically, this is a symbolic link

pointing to a separate physical disk to keep the Journal on a

different disk from the File System Database.

Volumes contain “real” data.

The File System Database contains metadata,

which includes the directory structure, file attributes,

media information, and storage information.

Inodes map the metadata to “real”

data found on the media.

UNIX Server

AMASS

File

System

Database

Inodes

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 445 446

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ADIC Time Clock 6-00028-01 Rev A Manual de usuario Pagina 53

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