TS/MP System Management Manual (H06.05+, J06.03+)

Glossary
HP NonStop TS/MP System Management Manual—541819-007
Glossary-21
reduced instruction-set computing (RISC)
reduced instruction-set computing (RISC). A processor architecture based on a relatively
small and simple instruction set, a large number of general-purpose registers, and an
optimized instruction pipeline that supports high-performance instruction execution.
See also complex instruction-set computing (CISC).
relative pathname. An OSS pathname that does not begin with a slash (/) character.
A relative pathname is resolved beginning with the current working directory. See also
OSS pathname, absolute pathname, and current working directory.
Remote Duplicate Database Facility (RDF). The Tandem software product that assists in
disaster recovery for OLTP production databases, monitors database updates audited
by the TMF subsystem on a primary system, and applies those updates to a copy of
the database on a remote system.
Remote Server Call (RSC). A Tandem software product that facilitates client/server
computing, allowing personal computer (PC) or workstation applications running under
Microsoft Windows software or the MS-DOS or OS/2 operating system to access
Pathway server classes and Guardian processes. Transactions are transmitted from
the PC or workstation application (the client) to a Pathway application running on a
Tandem NonStop system (the server) by means of a supported communications
protocol, such as NETBIOS, TCP/IP, or an asynchronous connection.
reply message. The part of an interprocess communication message that is formatted by a
server and returned to the original requester. The message contains the results of the
server’s work. See also request message.
reply translation header. A group of header fields that the Pathway translation server for
the NonStop TUXEDO system inserts at the beginning of each reply message it relays
from the application service to a SCREEN COBOL or Pathsend requester. This header
indicates whether the request was processed successfully and whether the reply
contains data returned by the application service. See also request translation header.
requester. A process or program that runs in the Guardian environment on a Tandem
NonStop system and requests services from a server process. For example, a
SCREEN COBOL program is a requester program that is interpreted by the terminal
control process (TCP), which provides link access to Pathway server classes. Another
type of requester program makes requests through Pathsend procedure calls; such a
requester uses the LINKMON process for link access to server classes. A third type of
requester communicates with server processes directly by calling the Guardian
WRITEREAD procedure; this kind of requester does not use server classes. A
requester is a specific type of client. See also client, server, and requester/server
model.
requester/server model. A model for application design that divides the tasks of data
input, data manipulation, and data output between two basic types of process:
requesters and servers. A requester sends a request to a server. The server takes the
requested action and then replies to the requester. The requester and server may
reside on the same processor or on different processors. This model is used for