Glossary

TimeFinder (EMC Symmetrix specific term)

A business continuation process that creates an instant copy of single or multiple Symmetrix Logical Devices (SLDs). The instant copy is created on specially preconfigured SLDs called BCVs and is accessible via a separate device address to the system(s).

TLU

Tape Library Unit.

TNSNAMES.ORA (Oracle and SAP R/ 3 specific term)

A network configuration file that contains connect descriptors mapped to service names. The file may be maintained centrally or locally, for use by all or individual clients.

transaction

A mechanism for ensuring that a set of actions is treated as a single unit of work. Databases use transactions to keep track of database changes.

transaction backup

Transaction backups generally use fewer resources than database backups, so they can be created more frequently than database backups. By applying transaction backups, you can recover the database to a specific point in time prior to when a problem occurred.

transaction backup (Sybase and SQL

specific term)

A backup of the transaction log providing a record of changes made since the last full or transaction backup.

transaction log backup

Transaction log backups generally use fewer resources than database backups so they can be created more frequently than database backups. By applying transaction log backups, you can recover the database to a specific point in time.

transaction log files

Files that record transactions of the database modifications, and provide fault tolerance in case of a database disaster.

transaction logs (Data Protector specific term)

Keeps track of IDB changes. The archiving of transaction logs should be enabled to prevent you from losing the transaction log files that are created after the last IDB backup and are necessary for IDB recovery.

transaction log table (Sybase specific

term)

A system table in which all changes to the database are automatically recorded.

transportable snapshot (MS VSS

specific term)

A shadow copy that is created on the

G-46