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Managed System for SAN Storage Agent User's Guide


Glossary


The terms in this glossary are defined as they pertain to the Tivoli
Storage Manager library. If you do not find the term you need, refer to
the IBM Software Glossary on the Web at this URL: www.ibm.com/ibm/terminology/. You can
also refer to IBM Dictionary of Computing, New York:
McGraw-Hill, 1994. For a complete Tivoli Storage Manager glossary, see
Administrator's Guide.

This glossary may include terms and definitions from:


A

ACSLS
Automated cartridge system library software.

application client
One of the Tivoli Data Protection for application programs installed on a system. The Tivoli Storage Manager server provides backup services to these clients.

archive
To copy one or more files to a storage pool for long-term storage. Archived files can include descriptive information and can be retrieved by archive date, by file name, or by description. Contrast with retrieve.

automated cartridge system library software (ACSLS)
A library-enablement application from StorageTek. ACSLS functions as the central service provider for library operations.

B

back up
To copy information to another location to ensure against loss of data. In Tivoli Storage Manager, you can back up user files, the Tivoli Storage Manager database, and storage pools. Contrast with restore.

backup-archive client
A program that runs on a workstation or file server and provides a means for users to back up, archive, restore, and retrieve files.

C

client
A program running on a PC, workstation, file server, LAN server, or mainframe that requests services of another program, called the server. The following types of clients can obtain services from a Tivoli Storage Manager server: administrative client, application client, API client, backup-archive client, and HSM client (also known as space manager client).

client node
A file server or workstation on which the backup-archive client program has been installed, and which has been registered to the server.

client options file
A file that a client can change, containing a set of processing options that identify the server, communication method, and options for backup, archive, hierarchical storage management, and scheduling. Also called the dsm.opt file.

D

device class
A named set of characteristics applied to a group of storage devices. Each device class has a unique name and represents a device type of disk, file, optical disk, or tape.

device configuration file
(1) On a Tivoli Storage Manager storage agent, a file that contains the name and password of the storage agent, and the DEFINE SERVER command for the Tivoli Storage Manager server that is managing the SAN-attached libraries and drives.
(2) On a Tivoli Storage Manager server, a file that contains information about defined device classes, and, on some Tivoli Storage Manager servers, defined libraries and drives.

device driver
A collection of subroutines that control the interface between I/O device adapters and the processor.

dsm.opt file
See client options file.

dsmserv.opt
See server options file.

dsmsta.opt
See storage agent options file.

E

external library
A type of enablement provided by Tivoli Storage Manager to allow LAN-free data movement for ACSLS-managed StorageTek libraries. To activate this support the Tivoli Storage Manager library type must be EXTERNAL.

F

FILE device type
A device type that specifies the use of sequential access files on disk storage as volumes.

L

LAN
Local area network.

LAN-free data transfer
The movement of client data directly between a client and a storage device over a SAN, rather than over the LAN.

library
(1) A repository for demountable recorded media, such as magnetic tapes.
(2) For Tivoli Storage Manager, a collection of one or more drives, and possibly robotic devices (depending on the library type), which can be used to access storage volumes.

library manager
A Tivoli Storage Manager server that controls device operations when multiple Tivoli Storage Manager servers share a storage device. The device operations include mount, dismount, volume ownership, and library inventory.

M

management class
A policy object that users can bind to each file to specify how the server manages the file. The management class can contain a backup copy group, an archive copy group, and space management attributes. The copy groups determine how the server manages backup versions or archive copies of the file. The space management attributes determine whether the file is eligible to be migrated by the space manager client to server storage, and under what conditions the file is migrated.

N

node
A workstation or file server that is registered with a Tivoli Storage Manager server to receive its services. See also client node.

P

policy domain
A policy object that contains policy sets, management classes, and copy groups that are used by a group of client nodes. See policy set and management class.

policy set
A policy object that contains a group of management classes that exist for a policy domain. Several policy sets can exist within a policy domain but only one policy set is active at one time. See policy domain and management class.

R

reclamation
A process of consolidating the remaining data from many sequential access volumes onto fewer new sequential access volumes.

restore
To copy information from its backup location to the active storage location for use. In Tivoli Storage Manager, you can restore the server database, storage pools, storage pool volumes, and users' backed-up files. The backup version in the storage pool is not affected by the restore operation. Contrast with backup.

S

SAN
Storage area network.

SCSI
Small computer system interface.

server
The program that provides backup, archive, space management, and administrative services to clients. The server program must be at the necessary level to provide all of these services.

server options file
A file that contains settings that control various server operations. These settings, or options, affect such things as communications, devices, and performance.

server storage
The primary and copy storage pools used by the server to store users' files: backup versions, archive copies, and files migrated from Tivoli Space Manager client nodes (space-managed files). See storage pool.

shared library
A library device that is shared among multiple Tivoli Storage Manager servers.

storage agent
A program that enables Tivoli Storage Manager to back up and restore client data directly to and from SAN-attached storage.

storage agent options file
A file that specifies options for the storage agent. This includes the name of the Tivoli Storage Manager server with which the storage agent communicates, the number of sessions that can be kept open to the server, and the name of the device configuration file. Also called the dsmsta.opt file.

storage pool
A named set of storage volumes that is the destination that the Tivoli Storage Manager server uses to store client data. The client data consists of backup versions, archive copies, and migrated files. You can back up a primary storage pool to a copy storage pool.

T

tape library
A term used to refer to a collection of drives and tape cartridges. The tape library may be an automated device that performs tape cartridge mounts and demounts without operator intervention.


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