TMF Glossary (G06.26+)

TMF Glossary
HP NonStop TMF Glossary—522415-003
Glossary-17
system-defined transaction
system-defined transaction. A TMF transaction initiated by NonStop SQL either in a
program unit or in a requester on whose behalf the program unit performs database
operations. Contrast with user-defined transaction.
Most Data Definition Language (DDL) and Data Manipulation Language (DML)
statements are transaction-initiating; the system automatically initiates a transaction
when the statement begins executing. The exceptions include DML statements
executing on nonaudited tables or under read uncommitted access on audited tables.
T
Tandem Advanced Command Language (TACL). The command language that provides
the NonStop Kernel operating system’s interactive user interface. TACL features built-
in functions that can be used for constructing programmatic routines and macros.
Some of these functions call operating system procedures that perform TMF
operations.
TMF. The Transaction Management Facility, a product that provides transaction protection
and database consistency in demanding online transaction processing (OLTP) and
decision-support environments. It gives full protection to transactions that access
distributed SQL and Enscribe databases, as well as recovery capabilities for
transactions, online disk volumes, and entire databases. To furnish this service, TMF
manages database transactions, keeps track of database activity through audit trails,
and provides database recovery methods.
TMF catalog. The database that specifies where all dumped files reside and which dump
media are available for reuse.
TMF incarnation. Each new creation of a TMF configuration begins with a DELETE TMF
command and is referred to as an incarnation; any previous configuration is erased.
TMF uses unique identifiers to distinguish between information and resources
associated with particular TMF incarnations.
TMF operation. A TMF function, such as TMF Start, TMF Stop, or file recovery. TMF
recognizes each specific instance of an operation as unique and assigns a unique
operation serial number to distinguish this operation from other recent operations of the
same type.
TMF scratch tapes. A tape volume that is available for writing dumps, defined as such in
the TMF catalog.
TMF subvolume. The subvolume where TMF configuration files and the TMF catalog
reside. The default is $SYSTEM.ZTMFCONF.
TMFCOM. The TMF interactive command interface, which allows operators to enter
commands and receive responses through a terminal keyboard and monitor.