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Managed System for SAN Storage Agent User's Guide
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:
- The American National Standard Dictionary for Information
Systems, ANSI X3.172-1990, copyright (ANSI). Copies may be
purchased from the American National Standards Institute, 11 West 42nd Street,
New York 10036.
- The Information Technology Vocabulary, developed by
Subcommittee 1, Joint Technical Committee 1, of the International Organization
for Standardization and the International Electrotechnical Commission (ISO/IEC
JTC2/SC1).
- A
- 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.
- 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.
- 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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