RDF/IMP and IMPX System Management Manual (RDF 1.3+)

Introducing RDF

Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001

1-10

RDF Processes

To accomplish its four major tasks, RDF runs different processes on the primary system

and the backup system. These processes (the monitor and extractor on the primary

system and the receiver, updaters, and purger on the backup system) divide these tasks

as summarized in the following pages. The relationship of these processes to one

another is illustrated in Figure 1-3

. More details about their operation appear under RDF

Operations.

Figure 1-3. RDF Subsystem Processes

Audited

Database

Updaters

$U01-$U0n

Image

File

Purger

$PRG

Receiver

$RCV

Extractor

$EXT

Monitor

$MON1

RDFCOM

TM/MP

Product

Application

Processes

Replicated

Database

Master

Audit

Trail

· All audit

· File label modifications

· Synchronization & control records

Legend

Names shown for Monitor, Extractor, Purger, Receiver, and Updater processes were specified by

the user during configuration.

Backup systemPrimary system