AMASS Overview

Optical

CD

metadata

Represents the directory structure and attributes about media. Attributes include:

Media ID

Media type

Media location

Ownership

Timestamp

The metadata for the AMASS file system resides in the AMASS database. See also File System Database and inode.

migration

The planned movement of data from one library — and possibly from one type of media — to another.

multi-tier migration

A storage policy that migrates files from a client machine through DataMgr and AMASS to a primary storage library. The file is then migrated to a second and third storage device after a specific time limit.

N

NFS

Network File System. Originally developed by Sun Microsystems, it has become the de facto standard for file sharing between UNIX systems. NFS was designed to be a distributed file service that is operating system-independent and machine-type- independent. Consequently, any computer system can supply files to many different computer types. NFS uses the Remote Procedure Call (RPC) mechanism to perform tasks, read results, and access remote files.

NIS

Network Information Service. Created by Sun to make NFS easier to use. NIS centralizes user and group name databases for an entire domain. (A domain consists of a master server, slave servers, and clients.) NIS allows the domain to be administered as if it were a single system. NIS centralizes many of the local network configuration functions. NIS used to be called Yellow Pages (YP).

6-00026-01 Rev A

Glossary

GL-7