TS/MP Pathsend and Server Programming Manual (G06.24+, H06.03+)

Glossary
NonStop TS/MP Pathsend and Server Programming Manual–132500
Glossary-26
terminal data area (TDA)
terminal data area (TDA). In SCREEN COBOL, the area that the TCP allocates for
terminal context data. The MAXTERMDATA parameter of the PATHCOM SET TCP
command defines the upper limit for this data area.
TERM object. A definition of a task that uses a SCREEN COBOL program to control an
input/output device such as a terminal or workstation, or an input/output process such as
a front-end process. A TERM object can be either explicitly configured with an ADD
command or created by the PATHMON process through a PATHCOM RUN PROGRAM
or SPI START PROG command. TERM objects created by the latter method are called
temporary TERM objects. See also configured TERM object and temporary TERM
object.
thaw condition. A condition in which prohibition of communication between a terminal and
a server class is lifted. See also freeze condition.
thread. A task that is separately dispatched and that represents a sequential flow of control
within a process (for example, a TCP).
throughput. The number of transactions a system can process in a given period, such as one
second.
TMF. See Transaction Management Facility (TMF) subsystem.
TMF level recovery. Recovery of the database to a consistent state through the use of the
TMF subsystem. When a failure occurs, the TMF subsystem allows the application to
back out the entire transaction, returning the contents of the database to the values it
held when the transaction was started. The application can then retry the transaction.
TNS. See Tandem NonStop Series (TNS).
TNS/R. See Tandem NonStop Series/RISC (TNS/R).
token. (1) An attribute control element in the CONTROLLED clause of a SCREEN COBOL
program, which allows run-time control of display attributes. This token consists of an
attribute identifier and an attribute value. (2) In the Subsystem Programmatic Interface
(SPI), a distinguishable unit in a message. An SPI token consists of an identifier (token
code or token map) and a token value. Programs place tokens in an SPI buffer by calling
the SSPUT procedure and retrieve them from the buffer by using the SSGET procedure.
transaction. An operation or a series of operations that retrieves and updates information to
reflect an exchange of goods or services. In the process of retrieving and updating
information, a transaction transforms a database from one consistent state to another.
The TMF subsystem treats a transaction as a single unit; either all of the changes made
by a transaction are made permanent (the transaction is committed) or none of the
changes are made permanent (the transaction is aborted).
Transaction Application Language (TAL). A systems programming language with many
features specific to stack-oriented Tandem NonStop systems. See also Portable
Transaction Application Language (pTAL).