Installation and User's Guide

GlossaryThis glossary includes terms and definitions for IBM Tivoli Storage Manager.To view glossaries for other IBM products, go tohttp://www.ibm.com/software/globalization/terminology/.The following cross-references are used in thisglossary:v See refers the reader from a term to a preferredsynonym, or from an acronym or abbreviationto the defined full form.v See also refers the reader to a related orcontrasting term.Aabsolute modeIn storage management, a backupcopy-group mode that specifies that a fileis considered for incremental backup evenif the file has not changed since the lastbackup. See also modified mode.access control list (ACL)In computer security, a list associatedwith an object that identifies all thesubjects that can access the object andtheir access rights. For example, an accesscontrol list is associated with a file thatidentifies the users who can access thatfile and their access rights.access modeAn attribute of a storage pool or a storagevolume that specifies whether the servercan write to or read from the storage poolor storage volume. The access mode canbe read/write, read-only, or unavailable.Volumes in primary storage pools canalso have an access mode of destroyed.Volumes in copy storage pools can alsohave an access mode of offsite.acknowledgmentThe transmission of acknowledgmentcharacters as a positive response to a datatransmission.ACL See access control list.activateTo validate the contents of a policy setand then make it the active policy set.active-data poolA named set of storage pool volumes thatcontain only active versions of clientbackup data.active file systemA file system to which space managementhas been added. With space management,tasks for an active file system includeautomatic migration, reconciliation,selective migration, and recall. Contrastwith inactive file system.active policy setThe activated policy set that contains thepolicy rules in use by all client nodes thatare assigned to the policy domain. Seealso policy domain and policy set.active versionThe most recent backup copy of a filestored. The active version of a file cannotbe deleted until a backup process detectsthat the user has either replaced the filewith a newer version or has deleted thefile from the file server or workstation.Contrast with inactive version.activity logA log that records normal activitymessages that are generated by the server.These messages include information aboutserver and client operations, such as thestart time of sessions or device I/O errors.adaptive subfile backupA type of backup that sends only changedportions of a file to the server, instead ofsending the entire file. Adaptive subfilebackup reduces network traffic andincreases the speed of the backup.administrative clientA program that runs on a file server,workstation, or mainframe thatadministrators use to control and monitorthe Tivoli Storage Manager server.Contrast with backup-archive client.administrative command scheduleA database record that describes theplanned processing of an administrative© Copyright IBM Corp. 1993, 2010 673