RDF System Management Manual for J-series and H-series RVUs (RDF Update 13)

Reading the Backup Database (BROWSE versus STABLE Access)................................................138
Near Real Time Read Access to Updates on the Primary System.................................................138
Access to Backup Databases with Stable Access.......................................................................139
Stopping TMF on the Primary System..................................................................................139
Using the STOP RDF, DRAIN Command..............................................................................139
STOP UPDATE to a Timestamp...........................................................................................139
RDF and NonStop SQL DDL Operations..................................................................................140
Performing Nonshared Access DDL Operations....................................................................141
Performing Shared Access DDL Operations.........................................................................141
RDF and NonStop SQL/MX Operations..................................................................................143
Backing Up Image Trail Files..................................................................................................143
TMF and Online Dumps on the Backup System.........................................................................144
Doing FUP RELOAD Operations With Updaters Running............................................................145
Exception File Optimization....................................................................................................145
Switching Disks on Updater UPDATEVOLUMES.........................................................................145
Online Remirroring of Updater UPDATEVOLUMES.....................................................................146
6 Maintaining the Databases......................................................................147
Understanding Database States..............................................................................................147
Making Changes to Database Structures.................................................................................150
NonStop SQL/MP or NonStop SQL/MX Databases.............................................................150
Enscribe Databases..........................................................................................................154
Resynchronizing Databases....................................................................................................155
Resynchronizing Entire Databases Offline............................................................................155
Resynchronizing Individual Volumes, Tables, and Files Offline................................................156
Resynchronizing Individual Tables or Files Offline.................................................................156
7 Online Database Synchronization.............................................................157
Overview............................................................................................................................157
Synchronizing Entire Databases Online...................................................................................158
Considerations When Synchronizing Entire Databases..........................................................159
Example of Synchronizing An Entire Database Online..........................................................164
Synchronizing Selected Database Portions Online.....................................................................165
Overview........................................................................................................................165
Partial Database Synchronization Issues..............................................................................166
Phases of Online Database Synchronization.............................................................................172
Extractor Phases..............................................................................................................172
Updater Phase 2..............................................................................................................173
Extractor Restart Considerations During Online Database Synchronization....................................173
Determining When Online Database Synchronization Is Complete..............................................174
Extractor Messages..........................................................................................................174
Updater Messages...........................................................................................................174
8 Entering RDFCOM Commands.................................................................175
Elements of RDFCOM Command Descriptions..........................................................................175
Purpose, Syntax, and Attributes..........................................................................................175
Where Issued..................................................................................................................175
Security Restrictions..........................................................................................................175
RDF State Requirement......................................................................................................176
Usage Guidelines............................................................................................................176
Output Displayed.............................................................................................................178
Examples........................................................................................................................178
RDFCOM-Related Filenames and Process Identifiers...................................................................179
Reserved File Names........................................................................................................179
Disk File Names..............................................................................................................179
Nondisk Device Names....................................................................................................179
6 Contents