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

Figure 6-4 Synchronized Databases After STOP TMF Command
Figure 6-5 shows unsynchronized databases. In this figure, T5 and T6 (transactions 5 and 6) have
not been transmitted to the backup system because of a physical disaster, such as fire or flood,
or because the primary or backup systems have failed. The databases are unsynchronized because
transactions were committed or aborted on the primary system before an unexpected shutdown,
and the extractor cannot transmit the commit or abort status records for those transactions (T5
and T6) to the backup system.
Figure 6-5 Unsynchronized Databases
Backing Up Altered Database Structures
When you change the structure of a database on the primary system, you also need to change
the structure on the backup system.
NonStop SQL/MP or NonStop SQL/MX Databases
For NonStop SQL/MP or NonStop SQL/MX databases, changes you need to perform on the
backup system include:
• Catalog changes
• Results of DDL operations, including creating or altering tables and views
Backing Up Altered Database Structures 149