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

Takeover Phase 2 – File Undo............................................................................................289
Takeover Phase 3 – Network Undo....................................................................................289
Takeover Phase 3 Performance..........................................................................................290
Communication Failures During Phase 3 Takeover Processing................................................290
Takeover Delays and Purger Restarts...................................................................................290
Takeover Restartability......................................................................................................290
Takeover and File Recovery...............................................................................................290
The Effects of Undoing Network Transactions.......................................................................291
Takeover and the RETAINCOUNT Value.............................................................................293
Network Configurations and Shared Access NonStop SQL/MP DDL Operations...........................293
Network Validation and Considerations...................................................................................294
RDF Reinitialization in a Network Environment..........................................................................294
Network Master Subsystem Initialization..............................................................................294
Non-Network Master Subsystem Initialization.......................................................................294
RDF Networks and ABORT or STOP RDF Operations.................................................................294
RDF Networks and Stop-Update-to-Time Operations..................................................................295
Sample Configurations..........................................................................................................295
Sample Network Master Configuration...............................................................................295
Sample Non-Network Master Configuration........................................................................296
RDFCOM STATUS Display.....................................................................................................297
15 Process-Lockstep Operation....................................................................299
Starting a Lockstep Operation................................................................................................300
The DoLockstep Procedure.....................................................................................................300
Including the DoLockstep in COBOL85 Applications.............................................................300
Invoking DoLockStep by Way of TAL...................................................................................300
DoLockStep Execution.......................................................................................................301
The Lockstep Transaction........................................................................................................302
RDF Lockstep File..................................................................................................................302
Multiple Concurrent Lockstep Operations.................................................................................302
Lockstep and Auxiliary Audit Trails..........................................................................................303
The Lockstep Gateway Process...............................................................................................303
NAME...........................................................................................................................303
PROGRAM.....................................................................................................................303
STARTUPMSG..................................................................................................................303
AUTORESTART.................................................................................................................303
Disabling Lockstep................................................................................................................303
Reenabling Lockstep..............................................................................................................304
Lockstep Performance Ramifications.........................................................................................304
Lockstep and Network Transactions.........................................................................................304
Lockstep Gateway Event Messages.........................................................................................305
16 NonStop SQL/MX and RDF...................................................................316
Including and Excluding SQL/MX Objects...............................................................................316
Creating NonStop SQL/MX Primary and Backup Databases......................................................316
Creating a NonStop SQL/MX Backup Database From an Existing Primary Database.....................319
Online Database Synchronization With NonStop SQL/MX Objects.............................................321
Creating the Fuzzy Copy on the Primary System..................................................................321
Creating the Fuzzy Copy on the Backup System...................................................................323
Offline Synchronization for a Single Partition............................................................................323
Directly From the Primary to the Backup..............................................................................323
Indirectly From the Primary to the Backup By Way of a Temporary File....................................324
Backup Partition Does Not Already Exist.............................................................................324
Online Synchronization for a Single Partition............................................................................324
Correcting Incorrect NonStop SQL/MX Name Mapping............................................................325
Primary and Backup ANSI Catalog Are the Same................................................................325
Contents 9