Installation and User's Guide

information that can be used to eliminatethe need to recall a migrated file.stub file sizeThe size of a file that replaces the originalfile on a local file system when the file ismigrated to Tivoli Storage Managerstorage. The size that is specified for stubfiles determines how much leader datacan be stored in the stub file. The defaultfor stub file size is the block size definedfor a file system minus 1 byte.subscriptionIn a Tivoli environment, the process ofidentifying the subscribers that theprofiles are distributed to. For TivoliStorage Manager, a subscription is theprocess by which a managed serverreceives configuration informationassociated with a particular profile on aconfiguration manager. See also managedserver, configuration manager, and profile.system privilege classA privilege class that gives anadministrator the authority to issue allserver commands. See also privilege class.Systems Network Architecture (SNA)The description of the logical structure,formats, protocols, and operationalsequences for transmitting informationthrough and controlling the configurationand operation of networks.Ttape libraryA set of equipment and facilities thatsupport an installation's tapeenvironment. The tape library can includetape storage racks, mechanisms forautomatic tape mounting, a set of tapedrives, and a set of related tape volumesmounted on those drives.tape volume prefixThe high-level-qualifier of the file nameor the data set name in the standard tapelabel.target nodeA client node for which other client nodes(called agent nodes) have been grantedproxy authority. The proxy authorityallows the agent nodes to performoperations such as backup and restore onbehalf of the target node, which owns thedata.TCA See trusted communications agent.TCP/IPSee Transmission Control Protocol/InternetProtocol.threshold migrationThe process of moving files from a localfile system to Tivoli Storage Managerstorage based on the high and lowthresholds that are defined for the filesystem. Contrast with demand migration,selective migration, and migration job.throughputIn storage management, the total bytes inthe workload, excluding overhead, thatare backed up or restored, divided byelapsed time.timeoutA time interval that is allotted for anevent to occur or complete beforeoperation is interrupted.timestamp control modeA mode that determines whethercommands preserve the access time for afile or set it to the current time.Tivoli Storage Manager command scriptA sequence of Tivoli Storage Manageradministrative commands that are storedin the database of the Tivoli StorageManager server. The script can run fromany interface to the server. The script caninclude substitution for commandparameters and conditional logic.tombstone objectA small subset of attributes of a deletedobject. The tombstone object is retainedfor a specified period, and at the end ofthe specified period, the tombstone objectis permanently deleted.Transmission Control Protocol/Internet Protocol(TCP/IP)An industry-standard, nonproprietary setof communication protocols that providesreliable end-to-end connections betweenapplications over interconnected networksof different types.transparent recallThe process that is used to automaticallyrecall a file to a workstation or file serverwhen the file is accessed. See also recallmode. Contrast with selective recall.Glossary 691