Glossary


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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

The terms in this glossary are defined as they pertain to the Tivoli Storage Manager library. If you do not find the term you are looking for, refer to other IBM glossaries at this Web site: http://www.ibm.com/ibm/terminology/

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A  Top
absolute mode
A backup copy group mode that specifies that a file is considered for incremental backup even if the file has not changed since the last backup. See also mode. Contrast with modified.
access mode
An attribute of a storage pool or a storage volume attribute that specifies whether Tivoli Storage Manager can write to or read from the storage pool or storage volume. The access mode can be read/write, read-only, or unavailable. Volumes in primary storage pools can also have an access mode of destroyed. Volumes in copy storage pools can also have an access mode of offsite.
activate
To validate the contents of a policy set and make it the ACTIVE policy set.
active policy set
The activated policy set that contains the policy rules currently in use by all client nodes assigned to the policy domain. The active policy set is the policy set that was most recently activated for the policy domain. See also policy domain and policy set.
active version
The most recent backup copy of a file stored by Tivoli Storage Manager. The active version of a file cannot be deleted until a backup process detects that the user has either replaced the file with a newer version, or has deleted the file from the workstation. Contrast with inactive version.
activity log
A log that records normal activity messages generated by the server. These messages include information about server and client operations, such as the start time of sessions or device I/O errors. Each message includes a message ID, date and time stamp, and a text description. The number of days to retain messages in the activity log can be specified.
administrative client
A program that runs on a file server, workstation, or mainframe that allows administrators to control and monitor the server through administrator commands. Contrast with backup-archive client.
administrative command schedule
A database record that describes the planned processing of an administrative command during a specific time period. See also client schedule.
administrative privilege class
A level of authority granted to an administrator of Tivoli Storage Manager. The privilege class determines which tasks the administrator can perform. For example, an administrator with system privilege class can perform any administrative task. See system privilege class, policy privilege class, storage privilege class, operator privilege class, and analyst privilege class.
administrative session
A period of time in which an administrator user ID communicates with a server to perform administrative tasks. Contrast with client node session.
administrator
A user who has been registered to the server. Administrators can be authorized to one or more of the following administrative privilege classes: system, policy, storage, operator, or analyst. Administrators can use the administrative commands and queries allowed by their privileges.
aggregate
An object, stored in one or more storage pools, consisting of a group of logical files packaged together. See logical file and physical file.
analyst privilege class
A privilege class that allows an administrator to reset statistics.
application client
One of the Tivoli Data Protection for application programs installed on a system to protect an application. The Tivoli Storage Manager server provides backup services to an application client.
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.
archive copy
A file that has been archived to server storage.
archive copy group
A policy object containing attributes that control the generation, destination, and expiration of archive files. An archive copy group belongs to a management class.
archive retention grace period
The number of days that Tivoli Storage Manager retains an archived file when the server is unable to rebind the file to an appropriate management class.
assigned capacity
The portion of available space that can be used to store database or recovery log information. See also available space.
association
(1) The defined relationship between a client node and a client schedule. An association identifies the name of a schedule, the name of the policy domain to which the schedule belongs, and the name of a client node that performs scheduled operations.
(2) On a configuration manager, the defined relationship between a profile and an object such as a policy domain. Profile associations define the configuration information that will be distributed to a managed server when it subscribes to the profile.
audit
To check for logical inconsistencies between information that the server has and the actual condition of the system. Tivoli Storage Manager can audit volumes, the database, libraries, and licenses. For example, when Tivoli Storage Manager audits a volume, the server checks for inconsistencies between information about backed-up or archived files stored in the database and the actual data associated with each backup version or archive copy in server storage.
authentication
The process of checking a user's password before allowing that user access to the server. Authentication can be turned on or off by an administrator with system privilege.
authority
The right granted to a user to perform tasks with Tivoli Storage Manager servers and clients. See administrative privilege class.
autochanger
A small multislot tape device that has a mechanism that automatically puts tape cartridges into tape drives. Also called medium or media changer, or a library.
available space
The amount of space, in megabytes, that is available to the database or the recovery log. This space can be used to extend the capacity of the database or the recovery log, or to provide sufficient free space before a volume is deleted from the database or the recovery log.
B  Top
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. See also database backup series and incremental backup.
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. Contrast with administrative client.
backup copy group
A policy object containing attributes that control the generation, destination, and expiration of backup versions of files. A backup copy group belongs to a management class.
backup retention grace period
The number of days that Tivoli Storage Manager retains a backup version after the server is unable to rebind the file to an appropriate management class.
backup set
A portable, consolidated group of active backup versions of files, generated for a backup-archive client.
backup version
A file that a user backed up to server storage. More than one backup version of a file can exist in server storage, but only one backup version is the active version. See active version and inactive version.
binding
The process of associating a file with a management class name. See rebinding.
buffer pool
Temporary space used by the server to hold database or recovery log pages. See database buffer pool and recovery log buffer pool.
C  Top
cache
The process of leaving a duplicate copy on random access media when the server migrates a file to another storage pool in the hierarchy.
central scheduler
A function that allows an administrator to schedule client operations and administrative commands. The operations can be scheduled to occur periodically or on a specific date. See client schedule and administrative command schedule.
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 domain
The set of drives, file systems, or volumes that the user selects to back up or archive using the backup-archive client.
client migration
The process of copying a file from a client node to Tivoli Storage Manager storage and replacing the file with a stub file on the client node. The space management attributes in the management class control this migration. See also space management.
client node
A file server or workstation on which the backup-archive client program has been installed, which has been registered to the server.
client node session
A period of time in which a client node communicates with a server to perform backup, restore, archive, retrieve, migrate, or recall requests. Contrast with administrative session.
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.
client-polling scheduling mode
A client/server communication technique where the client queries the server for work. Contrast with server-prompted scheduling mode.
client schedule
A database record that describes the planned processing of a client operation during a specific time period. The client operation can be a backup, archive, restore, or retrieve operation, a client operating system command, or a macro. See also administrative command schedule.
client system options file
A file, used on UNIX clients, containing a set of processing options that identify the Tivoli Storage Manager servers to be contacted for services. This file also specifies communication methods and options for backup, archive, hierarchical storage management, and scheduling. Also called the dsm.sys file. See also client user options file.
client user options file
A user-created file, used on UNIX clients, containing a set of processing options that identify the server, communication method, backup and archive options, space management options, and scheduling options. Also called the dsm.opt file. See also client system options file.
closed registration
A registration process in which only an administrator can register workstations as client nodes with the server. Contrast with open registration.
collocation
The process of keeping all data belonging to a single client node or a single client file space on a minimal number of sequential-access volumes within a storage pool. Collocation can reduce the number of volumes that must be accessed when a large amount of data must be restored.
compression
The process of saving storage space by eliminating empty fields or unnecessary data in a file. In Tivoli Storage Manager, compression can occur at a workstation before files are backed up or archived to server storage. On some types of tape drives, hardware compression can be used.
configuration manager
One Tivoli Storage Manager server that distributes configuration information to other Tivoli Storage Manager servers (called managed servers) via profiles. Configuration information can include policy and schedules. See managed server and profile.
copy group
A policy object whose attributes control how backup versions or archive copies are generated, where backup versions or archive copies are initially located, and when backup versions or archive copies expire.  A copy group belongs to a management class. See also archive copy group, backup copy group, backup version, and management class.
copy storage pool
A named set of volumes that contains copies of files that reside in primary storage pools. Copy storage pools are used only to back up the data stored in primary storage pools. A copy storage pool cannot be a destination for a backup copy group, an archive copy group, or a management class (for space-managed files). See primary storage pool and destination.
D  Top
damaged file
A physical file for which Tivoli Storage Manager has detected read errors.
database
A collection of information about all objects managed by the server, including policy management objects, users and administrators, and client nodes.
database backup series
One full backup of the server database, plus up to 32 incremental backups made since that full backup. Each full backup that is run starts a new database backup series. A backup series is identified with a number.
database backup trigger
A set of criteria that defines when and how database backups are run automatically. The criteria determine how often the backup is run, whether the backup is a full or incremental backup, and where the backup is stored.
database buffer pool
Storage that is used as a cache to allow database pages to remain in memory for long periods of time, so that the server can make continuous updates to pages without requiring input or output (I/O) operations from external storage.
database snapshot
A complete backup of the entire Tivoli Storage Manager database to media that can be taken off-site. When a database snapshot is created, the current database backup series is not interrupted.  A database snapshot cannot have incremental database backups associated with it. Contrast with full backup.
data mover
A device, defined to Tivoli Storage Manager,  that moves data on behalf of the server.  A NAS file server can be a data mover.
default management class
A management class assigned to a policy set that the server uses to manage backed-up or archived files when a user does not specify a management class for a file.
desktop client
The group of clients supported by Tivoli Storage Manager that includes clients on Windows, Apple, and Novell NetWare operating systems.
destination
A copy group or management class attribute that specifies the primary storage pool to which a client file will be backed up, archived, or migrated.
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
A file that contains information about defined device classes, and, on some Tivoli Storage Manager servers, defined libraries and drives. The file can be created by using a Tivoli Storage Manager command or by using an option in the server options file. The information is a copy of the device configuration information in the Tivoli Storage Manager database.
disaster recovery plan
A file created by Tivoli Disaster Recovery Manager (DRM) that contains information about how to recover computer systems if a disaster occurs and scripts that can be run to perform some recovery tasks. The file includes information about the software and hardware used by the Tivoli Storage Manager server, and the location of recovery media.
domain
See policy domain or client domain.
DRM
Disaster recovery manager, also known as Tivoli Disaster Recovery Manager.
dsm.opt file
See client options file and client user options file.
dsmserv.opt file
See server options file.
dsm.sys file
See client system options file.
dynamic
A value for serialization that specifies that Tivoli Storage Manager accepts the first attempt to back up or archive a file regardless of whether the file is modified during the backup or archive process. See also serialization. Contrast with shared dynamic, shared static, and static.
E  Top
enterprise configuration
A method of setting up Tivoli Storage Manager servers so that the administrator can distribute the configuration of one of the servers to the  other servers, using server-to-server communication. See configuration manager, managed server, profile, and subscription.
enterprise logging
The sending of events from Tivoli Storage Manager servers to a designated event server. The event server routes the events to designated receivers, such as to a user exit. See also event.
estimated capacity
The available space, in megabytes, of a storage pool.
event
(1) An administrative command or a client operation that is scheduled to be run using Tivoli Storage Manager scheduling.
(2) A message that a Tivoli Storage Manager server or client issues. Messages can be logged using Tivoli Storage Manager event logging.
event record
A database record that describes actual status and results for events.
event server
A server to which other servers can send events for logging. The event server routes the events to any receivers that are enabled for the sending server's events.
exclude
To identify files that you do not want to include in a specific client operation, such as a backup or archive. You identify the files in an include-exclude list.
exclude-include list
See include-exclude list.
expiration
The process by which files are identified for deletion because their expiration date or retention period has passed. Backed-up or archived files are marked expired by Tivoli Storage Manager based on the criteria defined in the backup or archive copy group.
expiration date
On some Tivoli Storage Manager servers, a device class attribute used to notify tape management systems of the date when Tivoli Storage Manager no longer needs a tape volume. The date is placed in the tape label so that the tape management system does not overwrite the information on the tape volume before the expiration date.
export
To copy administrator definitions, client node definitions, policy definitions, server control information or file data to external media, or directly to another server. Used to move or copy information between servers.
extend
To increase the portion of available space that can be used to store database or recovery log information. Contrast with reduce.
F  Top
file space
A logical space in Tivoli Storage Manager server storage that contains a group of files. For clients on Windows systems, a file space is a logical partition that is identified by a volume label. For clients on UNIX systems, a file space is a logical space that contains a group of files backed up or archived from the same file system, or part of a file system that stems from a virtual mount point. Clients can restore, retrieve, or delete their file spaces from Tivoli Storage Manager server storage. Tivoli Storage Manager does not necessarily store all the files from a single file space together, but can identify all the files in server storage that came from a single file space.
file space ID (FSID)
A unique numeric identifier that the server assigns to a file space when it is stored in server storage.
frequency
A copy group attribute that specifies the minimum interval, in days, between incremental backups.
FSID
See file space ID.
full backup
The process of backing up the entire server database. A full backup begins a new database backup series. See also database backup series and incremental backup. Contrast with database snapshot.
fuzzy copy
A backup version or archive copy of a file that might not accurately reflect the original content of the file because Tivoli Storage Manager backed up or archived the file while the file was being modified.
H  Top
hierarchical storage management (HSM) client
The Tivoli Space Manager program that runs on workstations to allow users to maintain free space on their workstations by migrating and recalling files to and from Tivoli Storage Manager storage. Synonymous with space manager client.
high migration threshold
A percentage of the storage pool capacity that identifies when the server can start migrating files to the next available storage pool in the hierarchy. Contrast with low migration threshold. See server migration.
HSM client
Hierarchical storage management client. Also known as the space manager client.
I  Top
image backup
A backup of a full file system or raw logical volume as a single object.
import
The process of copying exported administrator definitions, client node definitions, policy definitions, server control information or file data from external media to a target server. A subset of information can be imported to a target server from the external media. Used to move or copy information between servers. 
inactive version
A backup version of a file that is either not the most recent backup version or that is a backup version of a file that no longer exists on the client system. Inactive backup versions are eligible for expiration processing according to the management class assigned to the file. Contrast with active version.
include-exclude file
On UNIX and Windows clients, a file containing statements that Tivoli Storage Manager uses to determine whether to include certain files in specific client operations, and to determine the associated management classes to use for backup, archive, and space management. See include-exclude list.
include-exclude list
A group of include and exclude option statements that Tivoli Storage Manager uses. The exclude options identify files that are not to be included in specific client operations such as backup or space management. The include options identify files that are exempt from the exclusion rules. The include options can also assign a management class to a file or group of files for backup, archive, or space management services. The include-exclude list for a client may include option statements from the include-exclude file (for UNIX or Windows clients), from the client options file (for other clients), and from a client option set on the server.
incremental backup
(1) The process of backing up files or directories that are new or have changed since the last incremental backup. See also selective backup.
(2) The process of copying only the pages in the database that are new or changed since the last full or incremental backup of the database. Contrast with full backup. See also database backup series.
L  Top
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.
(3) In the AS/400 system, a system object that serves as a directory to other objects. A library groups related objects, and allows the user to find objects by name.
library client
A Tivoli Storage Manager server that uses server-to-server communication to access a library that is managed by another Tivoli Storage Manager server.
library manager
A Tivoli Storage Manager server that controls device operations when multiple Tivoli Storage Manager servers share a storage device. These operations include mount, dismount, volume ownership, and library inventory.
logical file
A file stored in one or more server storage pools, either by itself or as part of an aggregate. See also aggregate and physical file.
logical occupancy
The amount of space used by logical files in a storage pool. This space does not include the unused space created when logical files are deleted from aggregates, so it might be less than the physical occupancy. See also physical file and logical file.
logical volume
(1) A portion of a physical volume that contains a file system.
(2) For the Tivoli Storage Manager server, the combined space on all volumes for either the database or the recovery log. The database is one logical volume and the recovery log is one logical volume.
low migration threshold
A percentage of the storage pool capacity that specifies when the server can stop the migration of files to the next storage pool. Contrast with high migration threshold. See server migration.
M  Top
macro file
A file that contains one or more Tivoli Storage Managere administrative commands, which can be run only from an administrative client by using the MACRO command. Contrast with Tivoli Storage Manager command script.
managed object
A definition in the database of a managed server that was distributed to the managed server by a configuration manager. When a managed server subscribes to a profile, all objects associated with that profile become managed objects in the database of the managed server. In general, the definition cannot be modified locally on the managed server. Objects can include policy, schedules, client options sets, server scripts, administrator registrations, and server and server group definitions.
managed server
A Tivoli Storage Manager server that receives configuration information from a configuration manager via subscription to one or more profiles. Configuration information can include definitions of objects such as policy and schedules. See configuration manager, subscription, and profile.
managed system
A client or server that requests services from the Tivoli Storage Manager server.
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 Tivoli Storage Manager server manages backup versions or archive copies of the file. The space management attributes determine whether the file is eligible for migrated by the space manager client to server storage, and under what conditions the file is migrated. See also copy group, binding, and rebinding.
maximum extension
Specifies the maximum amount of storage space, in megabytes, that you can extend the database or the recovery log.
maximum reduction
Specifies the maximum amount of storage space, in megabytes, that you can reduce the database or the recovery log.
maximum utilization
The highest percentage of assigned capacity used by the database or the recovery log.
migrate
To move data from one storage location to another. See also client migration and server migration.
mirroring
The process of writing the same data to multiple disks at the same time. Mirroring data protects against data loss within the database or the  recovery log.
mode
A copy group attribute that specifies whether to back up a file that has not been modified since the last time the file was backed up. See modified and absolute.
modified mode
A backup copy group mode that specifies that a file is considered for incremental backup only if it has changed since the last backup. A file is considered changed if the date, size, owner, or permissions have changed. See mode. Contrast with absolute mode.
mount
To place a data medium (such as a tape cartridge) on a drive in a position to operate.
mount limit
A device class attribute specifying the maximum number of volumes that can be simultaneously accessed from the same device class. The mount limit determines the maximum number of mount points. See mount point.
mount point
A logical drive through which the server accesses volumes in a sequential access device class. For a removable media device such as tape, a mount point is a logical drive associated with a physical drive. For a device class with the device type of FILE, a mount point is a logical drive associated with an I/O stream. The number of mount points for a device class is determined by the mount limit for that class. See mount limit.
mount retention period
A device class attribute that specifies the maximum number of minutes that the server retains a mounted sequential access media volume that is not being used before it dismounts the sequential access media volume.
mount wait period
A device class attribute that specifies the maximum number of minutes that the server waits for a sequential access volume mount request to be satisfied before canceling the request.
N  Top
NAS
Network-attached storage.
NAS node
A Tivoli Storage Manager node that is a NAS file server.  Data for the NAS node is transferred by the NAS file server itself at the direction of a Tivoli Storage Manager server that uses NDMP. The data is not transferred by the Tivoli Storage Manager client. Also called NAS file server node.
native format
A format of data that is written to a storage pool directly by the Tivoli Storage Manager server.  Contrast with non-native data format.
NDMP
Network Data Management Protocol.
network-attached storage (NAS) file server
A dedicated storage device with an operating system that is optimized for file-serving functions.  In Tivoli Storage Manager, a NAS file server can have the characteristics of both a node and a data mover.  See also data mover and NAS node.
Network Data Management Protocol (NDMP)
An industry-standard protocol that allows a network storage-management application (such as Tivoli Storage Manager) to control the backup and recovery of an NDMP-compliant file server without installing third-party software on that file server.
node
(1) A workstation or file server that is registered with a Tivoli Storage Manager server to receive its services. See also client node and NAS node. (2) In a Microsoft cluster configuration, one of the computer systems that make up the cluster.  See cluster.
node privilege class
A privilege class that allows a user to remotely access backup-archive clients for a specific client node or for all clients in a policy domain.
non-native data format
A format of data written to a storage pool that is different from the format that the server uses for basic LAN-based operations.  The data is written by a data mover instead of the server.  Storage pools with data written in a non-native format may not support some server operations, such as audit of a volume.  The NETAPPDUMP data format for NAS node backups is an example of a non-native format.
 
O  Top
open registration
A registration process in which any users can register their own workstations as client nodes with the server. Contrast with closed registration.
operator privilege class
A privilege class that allows an administrator to issue commands that  disable or halt the server, enable the server, cancel server processes, and manage removable media.
P  Top
page
A unit of space allocation within Tivoli Storage Manager database volumes.
path
A Tivoli Storage Manager object that defines a one-to-one relationship between a source and a destination.  Using the path, the source accesses the destination.  Data may flow from the source to the destination, and back.  An example of a source is a data mover (such as a NAS file server), and an example of a destination is a tape drive.
physical file
A file stored in one or more storage pools, consisting of either a single logical file, or a group of logical files packaged together (an aggregate). See also aggregate and logical file.
physical occupancy
The amount of space used by physical files in a storage pool. This space includes the unused space created when logical files are deleted from aggregates. See also physical file, logical file, and logical occupancy.
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, management class, and copy group.
policy privilege class
A privilege class that allows an administrator to manage policy objects, register client nodes, and schedule client operations for client nodes. Authority can be restricted to certain policy domains.
policy set
A policy object that contains a group of management class definitions that exist for a policy domain. Several policy sets can exist within a policy domain but only one policy set can be active. See management class and active policy set.
premigration
For a space manager client, the process of copying files that are eligible for migration to server storage, while leaving the original file intact on the local system.
primary storage pool
A named set of volumes that the server uses to store backup versions of files, archive copies of files, and files migrated from HSM client nodes. You can back up a primary storage pool to a copy storage pool. See destination and copy storage pool.
privilege class
A level of authority granted to an administrator. The privilege class determines which administrative tasks the administrator can perform. For example, an administrator with system privilege class can perform any administrative task. Also called administrative privilege class. See system privilege class, policy privilege class, storage privilege class, operator privilege class, and analyst privilege class.
profile
A named group of configuration information that can be distributed from a configuration manager when a managed server subscribes. Configuration information can include registered administrators, policy, client schedules, client option sets, administrative schedules, server command scripts, server definitions, and server group definitions. See configuration manager and managed server.
R  Top
randomization
The process of distributing schedule start times for different clients within a specified percentage of the schedule's startup window.
rebinding
The process of associating a file with a backed-up file with a new management class name. For example, rebinding occurs when the management class associated with a file is deleted. See binding.
recall
To access files that have been migrated from workstations to server storage by using space manager client. Contrast with migrate.
receiver
A server repository that contains a log of server messages and client messages as events. For example, a receiver can be a file exit, a user exits, or the Tivoli Storage Manager server console and activity log. See also event.
reclamation
A process of consolidating the remaining data from many sequential access volumes onto fewer new sequential access volumes.
reclamation threshold
The percentage of reclaimable space that a sequential access media volume must have before the server can reclaim the volume. Space becomes reclaimable when files are expired or are deleted. The percentage is set for a storage pool.
recovery log
A log of updates that are about to be written to the database. The log can be used to recover from system and media failures.
recovery log buffer pool
Storage that the server uses to hold new transaction records until they can be written to the recovery log.
reduce
To free up space from the database or the recovery log, to allow you to delete a volume. Contrast with extend.
register
(1) To define a client node or administrator who can access the server. See registration.
(2) To specify licenses that have been purchased for the server.
registration
The process of identifying a client node or administrator to the server.
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.
retention
The amount of time, in days, that inactive backed-up or archived files are kept in the storage pool before they are deleted. Copy group attributes and default retention grace periods for the domain define retention.
retention period
On an MVS server, a device class attribute that specifies how long files are retained on sequential access media. When used, Tivoli Storage Manager passes this information to the operating system to ensure that other tape management systems do not overwrite tape volumes that contain retained data.
retrieve
To copy archived information from the storage pool to the workstation for use. The archive copy in the storage pool is not affected by the retrieve operation. Contrast with archive.
rollback
To remove changes that were made to database files since the last commit point.
S  Top
schedule
A database record that describes scheduled client operations or administrative commands. See administrative command schedule and client schedule.
scheduling mode
The method of interaction between a server and a client for running scheduled operations on the client. Tivoli Storage Manager supports two scheduling modes for client operations: client-polling and server-prompted.
scratch volume
A labeled volume that is either blank or contains no valid data, that is not defined to Tivoli Storage Manager, and .that is available for use.
script
See Tivoli Storage Manager command script.
selective backup
The process of backing up selected files or directories from a client domain. See also incremental backup.
serialization
The process of handling files that are modified during back up or archive processing. See static, dynamic, shared static, and shared dynamic.
server migration
The process of moving data from one storage pool to the next storage pool defined in the hierarchy, based on the migration thresholds defined for the storage pools. See also high migration threshold and low migration threshold.
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-prompted scheduling mode
A client/server communication technique where the server contacts the client when a scheduled operation needs to be done. Contrast with client-polling scheduling mode.
server storage
The primary and copy storage pools used by the server to store users' files: backup versions, archive copies, and files migrated from space manager client nodes (space-managed files). See primary storage pool, copy storage pool, storage pool volume, and volume.
session resource usage
The amount of wait time, CPU time, and space used or retrieved during a client session.
shared dynamic
A value for serialization that specifies that a file must not be backed up or archived if it is being modified during the operation. Tivoli Storage Manager retries the backup or archive operation a number of times; if the file is being modified during each attempt, Tivoli Storage Manager will back up or archive the file on its last try. See also serialization. Contrast with dynamic, shared static, and static.
shared library
A library device that is shared among multiple Tivoli Storage Manager
servers.
shared static
A value for serialization that specifies that a file must not be backed up or archived if it is being modified during the operation. Tivoli Storage Manager retries the backup or archive operation a number of times; if the file is being modified during each attempt, Tivoli Storage Manager will not back up or archive the file. See also serialization. Contrast with dynamic, shared dynamic, and static.
snapshot
See database snapshot.
source server
A server that can send data, in the form of virtual volumes, to another server. Contrast with target server.
space-managed file
A file that is migrated from a client node by the space manager client (HSM client).  The space manager client recalls the file to the client node on demand.
space management
The process of keeping sufficient free storage space available on a client node by migrating files to server storage. The files are migrated based on criteria defined in management classes to which files are bound, and the include-exclude list. Synonymous with hierarchical storage management. See also migration.
space manager client
The Tivoli Space Manager program that enables users to maintain free space on their workstations by migrating and recalling files to and from server storage. Also called hierarchical storage management (HSM) client.
startup window
A time period during which a schedule must be initiated.
static
A value for serialization that specifies that a file must not be backed up or archived if it is being modified during the operation. Tivoli Storage Manager does not retry the operation. See also serialization. Contrast with dynamic, shared dynamic, and shared static.
storage agent
A program that enables a Tivoli Storage Manager client to back up and restore client data directly to and from SAN-attached storage.
storage hierarchy
A logical ordering of primary storage pools, as defined by an administrator. The ordering is usually based on the speed and capacity of the devices that the storage pools use. In Tivoli Storage Manager, the storage hierarchy is defined by identifying the next storage pool in a storage pool definition. See storage pool.
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. See primary storage pool and copy storage pool.
storage pool volume
A volume that has been assigned to a storage pool. See volume, copy storage pool, and primary storage pool.
storage privilege class
A privilege class that allows an administrator to control how storage resources for the server are allocated and used, such as monitoring the database, the recovery log, and server storage. Authority can be restricted to certain storage pools. See also privilege class.
stub file
A file that replaces the original file on a client node when the file is migrated from the client node to server storage by Tivoli Space Manager.
subscription
The method by which a managed server requests that it receive configuration information associated with a particular profile on a configuration manager. See managed server, configuration manager, and profile.
system privilege class
A privilege class that allows an administrator to issue all server commands. See also privilege class.
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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.
tape volume prefix
A device class attribute that is the high-level-qualifier of the file name or the data set name in the standard tape label.
target server
A server that can receive data sent from another server. Contrast with source server. See also virtual volumes.
Tivoli Disaster Recovery Manager (DRM)
A product that works with Tivoli Storage Manager to assist in preparing and later using a disaster recovery plan for the Tivoli Storage Manager server.
Tivoli Storage Manager command script
A sequence of Tivoli Storage Manager administrative commands that are stored in the Tivoli Storage Manager server database. You can run the script from any interface to the server. The script can include substitution for command parameters and conditional logic. 
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UCS-2
An ISO/IEC 10646 encoding form, Universal Character Set coded in 2 octets. The Tivoli Storage Manager client on Windows NT and Windows 2000 uses the UCS-2 code page when the client is enabled for Unicode.
Unicode Standard
A universal character encoding standard that supports the interchange, processing, and display of text that is written in any of the languages of the modern world. It can also support many classical and historical texts and is continually being expanded. The Unicode Standard is compatible with ISO/IEC 10646. For more information, see http://www.unicode.org.
UTF-8
Unicode transformation format - 8. A byte-oriented encoding form specified by the Unicode Standard.
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validate
To check a policy set for conditions that can cause problems if that policy set becomes the active policy set. For example, the validation process checks whether the policy set contains a default management class.
version
A backup copy of a file stored in server storage. The most recent backup copy of a file is the active version.  Earlier copies of the same file are inactive versions. The number of versions retained by the server is determined by copy group attributes in the management class.
virtual volume
An archive file on a target server that represents a sequential media volume to a source server.
volume
The basic unit of storage for the Tivoli Storage Manager database, recovery log, and storage pools. A volume can be an LVM logical volume, a standard file system file, a tape cartridge, or an optical cartridge. Each volume is identified by a unique volume identifier. See database volume, scratch volume, and storage pool volume.
volume history file
A file that contains information about: volumes used for database backups and database dumps; volumes used for export of administrator, node, policy, or server data; and sequential access storage pool volumes that have been added, reused, or deleted. The information is a copy of the same types of volume information in the Tivoli Storage Manager database.