TS/MP Pathsend and Server Programming Manual (H06.05+, J06.03+)

batch processing A method of transaction processing in which transactions are first grouped together and then
processed at regular intervals. See also online transaction processing (OLTP).
block mode A terminal operating mode in which data is read from the terminal and displayed on the terminal
one screen at a time. See also conversational mode.
cache A temporary storage buffer.
cascading server A term formerly used for a nested server. See nested server.
checkpoint
message
In the Guardian environment, a message sent by a primary process to its backup process that
keeps the backup process up to date on the state of the application. A checkpoint message
provides a snapshot of process activity that can be used in the event of a takeover by a backup
process to allow the backup process to maintain fault-tolerant operation.
CISC See complex instruction-set computing (CISC).
client An application program that requests services to be performed. In discussions of the Pathway
environment, this term is used to refer to the part of an application that runs on some other vendor’s
hardware, such as a personal computer, Macintosh computer, UNIX workstation, or mainframe
computer system, and makes requests of a server process. See also requester, server, and
client/server model.
client/server model A model for distributing applications. In general, but not always, in this model the client process
resides on a workstation and the server process resides on a second workstation, minicomputer,
or mainframe system. Communication takes the form of request and reply pairs, which are initiated
by the client and serviced by the server. (A server can make requests of another server, therefore
acting as a client.) Client/server computing is often used to connect different types of workstations
or personal computers to a host computer system by means of supported communications protocols.
See also requester/server model.
client/transaction
server model
A model for client/server applications. The client/transaction server model is the model of choice
for high-volume OLTP applications in which transaction volume is great and the processing
requirements change infrequently.
In the NonStop environment, an application following this model divides processing between a
client running on a workstation and servers running on a NonStop system. The client handles the
user interface and business logic and processing. The servers store information for use by the
client and handle database input and output functions. Interprocess communication (IPC) messages
transfer data between client and server.
COBOL85 The HP compiler and run-time support for the American National Standards Institute (ANSI)
programming language COBOL, X.3.23-1985. Pathway server processes are often written in
this language.
cold start The operation that starts a PATHMON environment for the first time. This operation either creates
a new PATHMON configuration file (PATHCTL file) that defines the PATHMON environment and
its objects or overwrites an existing PATHMON configuration file (which effectively creates a new
PATHMON environment). See also cool start.
command file A file that serves as a source for command input. For example, users can prepare a command
file containing PATHCOM or SCREEN COBOL Utility Program (SCUP) commands. They can then
cause the commands in the file to be executed by issuing the PATHCOM or SCUP OBEY command
and specifying the name of the file. Alternatively, they can specify this file as the input file when
they execute PATHCOM or SCUP.
command
interpreter
An interactive program used to run programs, check system status, create and delete disk files,
and alter hardware states.
command terminal A terminal at which a system manager or operator enters commands for configuration and
management, such as the PATHCOM commands that configure and manage a PATHMON
environment. See also application terminal.
complex
instruction-set
computing (CISC)
A processor architecture based on a large instruction set, characterized by numerous addressing
modes, multicycle machine instructions, and many special-purpose instructions. See also reduced
instruction-set computing (RISC).
configuration The definition or alteration of characteristics of an object. See also object.
198 Glossary