Introduction to Data Management

Protecting Databases With RDF

15873 Tandem Computers Incorporated 8-5

RDFSCAN allows you to specify:

A starting point in the log file to begin scanning

The number of records to scan

Specific text to search for in the log file

RDFSCAN runs interactively from your terminal, and accesses the log file you

designate; it does not accept commands from a command file. RDFSCAN, like

RDFCOM, contains an online help facility.

RDF Processes RDF processes at the primary and backup sites work together to keep the backup

database up to date, as illustrated in Figure 8-2.

Figure 8-2. RDF Process Tasks

1. Captures audit trail records

2. Filters, blocks, and transmits records

to backup system

3. Receives and writes records to disk

4. Captures after-image records and

writes committed records to

backup database

Primary

Database

Backup

Database

Application

Processes

TMF

RDF

Primary System

Backup System

RDF

S8020-029

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