TS/MP 2.5 Pathsend and Server Programming Manual

of the PATHMON process, establishes links between screen programs and server processes. See
also requestor and SCREEN COBOL.
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.
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 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.
1.
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 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 NonStop systems.
See also Portable Transaction Application Language (pTAL).
transaction
backout
A TMF subsystem activity in which the effects of a partially completed transaction are canceled.
Transaction
Delivery Process
(TDP)
A multithreaded gateway process, part of the RSC/MP product, that runs on a NonStop system.
The TDP can be replicated and can manage many connections and workstations at one time, as
well as multiple sessions from each workstation.
transaction
identifier
A unique name that the TMF subsystem assigns to a transaction.
transaction log See audit trail.
transaction
management
The ability to coordinate transaction control functions, such as beginning and ending transactions,
committing or aborting transactions, and recovering transactions.
transaction mode The operating mode of a requestor program between the execution of a BEGINTRANSACTION
procedure call or statement and the execution of the associated ENDTRANSACTION or
ABORTTRANSACTION call or statement.
transaction
processing
See online transaction processing (OLTP).
transaction
workload
The number of transactions to be processed by an online transaction processing application.
TRANSFER delivery
system
An information delivery system that enables organizations to move and manage information
efficiently within a single NonStop system or across a network of systems. The TRANSFER delivery
system supports communications between users, I/O devices, and processes in the Guardian
environment.
220 Glossary