IBM Tivoli Storage Manager for UNIX and Linux Backup-Archive ...

packet In data communication, a sequence ofbinary digits, including data and controlsignals, that is transmitted and switchedas a composite whole.page A defined unit of space on a storagemedium or within a database volume.partial-file recall modeA recall mode that causes the hierarchicalstorage management (HSM) function toread just a portion of a migrated file fromstorage, as requested by the applicationaccessing the file.password generationA process that creates and stores a newpassword in an encrypted password filewhen the old password expires.Automatic generation of a passwordprevents password prompting. Passwordgeneration can be set in the options file(passwordaccess option). See also optionsfile.path An object that defines a one-to-onerelationship between a source and adestination. Using the path, the sourceaccesses the destination. Data can flowfrom the source to the destination, andback. An example of a source is a datamover (such as a network-attachedstorage [NAS] file server), and anexample of a destination is a tape drive.pattern-matching characterSee wildcard character.physical fileA file that is stored in one or morestorage pools, consisting of either a singlelogical file, or a group of logical files thatare packaged together as an aggregate.See also aggregate and logical file.physical occupancyThe amount of space that is used byphysical files in a storage pool. This spaceincludes the unused space that is createdwhen logical files are deleted fromaggregates. See also physical file, logical file,and logical occupancy.plug-inA self-contained software component thatmodifies (adds, or changes) the functionin a particular system. When a plug-in isadded to a system, the foundation of theoriginal system remains intact.policy domainA grouping of policy users with one ormore policy sets, which manage data orstorage resources for the users. The usersare client nodes that are associated withthe policy domain.policy privilege classA privilege class that gives anadministrator the authority to managepolicy objects, register client nodes, andschedule client operations for clientnodes. Authority can be restricted tocertain policy domains. See also privilegeclass.policy setA group of rules in a policy domain. Therules specify how data or storageresources are automatically managed forclient nodes in the policy domain. Rulescan be contained in management classes.See also active policy set and managementclass.premigrated fileA file that has been copied to TivoliStorage Manager storage, but has notbeen replaced with a stub file on the localfile system. An identical copy of the fileresides both on the local file system andin Tivoli Storage Manager storage.Premigrated files occur on UNIX andLinux file systems to which spacemanagement has been added. Contrastwith migrated file and resident file.premigrated files databaseA database that contains informationabout each file that has been premigratedto Tivoli Storage Manager storage. Thedatabase is stored in a hidden directorynamed .SpaceMan in each file system towhich space management has beenadded.premigrationThe process of copying files that areeligible for migration to Tivoli StorageManager storage, but leaving the originalfile intact on the local file system.premigration percentageA space management setting that controlswhether the next eligible candidates in afile system are premigrated followingthreshold or demand migration.552 IBM Tivoli Storage Manager for UNIX and Linux Backup-Archive Clients Version 6.1: Installation and User’s Guide