Pathway Products Glossary

Glossary
Compaq NonStop™ Pathway Products Glossary—426762-001
Glossary-24
process
process. (1) A unique execution of a program in the Guardian environment. (2) An entity in
the OSS environment consisting of an address space, a single thread of control that
executes within that address space, and the system resources required by that thread of
control. See also process type
.
process broker (PB) process. A process in a Pathway/XM environment that manages
processor (CPU) resource assignments for requesters and servers and also manages
distributed-server process reservations on behalf of link control service (LCS) processes.
One PB process, running as a process pair, is provided for each NODE object in the
Pathway/XM environment. See also distributed server class
, link control service (LCS)
process, process reservation, and NODE object.
process identification number (PIN). An unsigned integer that identifies a process within a
processor module in a NonStop™ Himalaya system.
process management. (1) The act of configuring, creating, and initializing processes; the
monitoring and stopping of processes; and the recovery of failed processes. The
PATHMON process provides process management functions for OLTP applications on
NonStop™ Himalaya systems. (2) The management of server process reservations for
distributed servers in the Pathway/XM environment. The process broker (PB) provides
this process management function. See also process reservation
.
process pair. A fault-tolerant arrangement of processes in the Guardian environment,
whereby two processes in separate processors share the same name and execute identical
code. One process functions as the primary process and the other functions as the
backup process. The two processes are kept in sync through checkpoint messages sent
from the primary to the backup process. If the primary process fails, the backup process
is notified that it is now the primary, and it resumes the application work from the last
valid checkpoint message.
process reservation. The assignment of a server process to a transaction request for a
specified period of time. For distributed server classes, the Pathway/XM environment
manages requests for access to server processes by means of process reservations rather
than links. Process reservations are managed by a process broker (PB) process. See
also link access
and link granting.
process type. An attribute of a server class indicating whether the server processes in that
server class are Guardian processes or OSS processes. See also process
.
PROFDBM utility. The database management utility that allows a system manager to add,
update, search for, and delete records in the user profile database for a Pathway/iTS web
client. See also user profile
and user profile database.
program file. An executable object file. See also object file
.
PROGRAM object. A template for creating and starting temporary TERM objects. See also
temporary TERM object
.
proxy server. A server that controls the access of internal resources from the internet using
the HTTP protocol.