TS/MP System Management Manual (G06.24+, H06.03+)

Glossary
NonStop TS/MP System Management Manual—541819-001
Glossary-23
Screen Section
Screen Section. A section in the Data Division of a SCREEN COBOL source program that
describes the types and locations of fields in screens that can be displayed on a
terminal.
SCUP. See SCREEN COBOL Utility Program (SCUP).
SEND operation. In SCREEN COBOL, an operation in which a transaction request
message is sent to a server process and a reply is received back from the server
process. See also server-class send operation.
server. (1) A process or program that provides services to a client or a requester. Servers
are designed to receive request messages from clients or requesters; perform the
desired operations, such as database inquiries or updates, security verifications,
numerical calculations, or data routing to other computer systems; and return reply
messages to the clients or requesters. A server process is a running instance of a
server program. (2) A combination of hardware and software designed to provide
services in response to requests received from clients across a network. For example,
Tandem’s Himalaya servers provide transaction processing, database access, and
other services. (In the NonStop TS/MP and Pathway/TS manual set, the word “server”
is generally used only when definition 1 is meant; for definition 2, “system” is usually
used instead of “server.”) See also client, requester, client/server model, and
requester/server model.
server class. A group of duplicate copies of a single server process, all of which execute
the same object program. Server classes are configured through the PATHMON
process.
server-class send operation. The sending of a message to a Pathway server class by
making a call to the Pathsend SERVERCLASS_SEND_ procedure. See also SEND
operation.
SERVER object. A definition of a server class within the configuration of a PATHMON
process.
service. A function performed by a server process or program on behalf of a requester or
client. A server can perform one or several services. The concept of a service is built
into the design of the Novell TUXEDO system and the NonStop TUXEDO system; for
these products, a service is a module of application code that carries out a service
request.
simple token. In the Subsystem Programmatic Interface (SPI), a token consisting of a
token code and a value that is either a single elementary field, such as an integer or a
character string, or a fixed (nonextensible) structure. See also extensible structured
token and token (definition 2).
single-threaded. A programming model that provides a single thread of control within a
program. For example, a single-threaded server handles only one request at a time
and must complete that request before accepting another. See also thread and
multithreaded.