RDF/IMP, IMPX, and ZLT System Management Manual

Introducing RDF
HP NonStop RDF/IMP, IMPX, and ZLT System Management Manual—524388-002
1-13
RDF Processes
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 1-4. More details about their operation appear
under RDF Operations.
Figure 1-4. RDF Subsystem Processes
Audited
Database
Updaters
$U01-$U0n
Pu rg er
$PRG
Receiver
$RCV
Extractor
$EXT
Monitor
$MON1
RDFCOM
TMF
Product
Application
Processes
Replicated
Database
Mas t er
Audit
Trail
· All audit
· File label modifications
· Synchronization & control records
Legend
Names show n for Monitor, Extractor, Purger, Receiver, and Updater processes w ere specified by the
user during configuration.
Backup systemPrimary system
Mas ter
Image
Trail
Secondary
Image
Trail
Audit
Fixup
ZLT standby system