RDF System Management Manual for H-Series RVUs (RDF 1.8)

Figure 1-4 RDF Subsystem Processes
Primary System Processes
On the primary system:
• The monitor process coordinates subsystem starts and stops, some messages, and NonStop
SQL/MP and NonStop SQL/MX DDL operations using the WITH SHARED ACCESS option
on protected volumes, and monitors the other RDF processes.
• Each extractor process reads an audit trail (the MAT or a particular auxiliary audit trail),
filters out audit records not relevant to the backup database, and then transmits the relevant
audit records to an associated receiver process on the backup system. Some control
information for synchronizing the extractor and receiver process pair is included each time
the extractor process transmits the audit records.
46 Introducing RDF