RDF/IMP, IMPX, and ZLT System Management Manual

Contents

HP NonStop RDF/IMP, IMPX, and ZLT System Management Manual—524388-002

viii

13. Network Transactions

Configuration Changes 13-2

Order of Configuration Steps 13-2

NETWORK Attribute 13-2

NETWORKMASTER Attribute 13-3

Network Configuration Record 13-3

RDF Network Synchronizer (RDFNET) Process 13-5

RDF Network Control Files 13-5

Normal RDF Processing Within a Network Environment 13-5

RDF Takeovers Within a Network Environment 13-6

Takeover Phase 1 – Local Undo 13-6

Takeover Phase 2 – File Undo 13-6

Takeover Phase 3 – Network Undo 13-6

Takeover Phase 3 Performance 13-7

Communication Failures During Phase 3 Takeover Processing 13-8

Takeover Delays and Purger Restarts 13-8

Takeover Restartability 13-8

Takeover and File Recovery 13-8

The Effects of Undoing Network Transactions 13-9

Takeover and the RETAINCOUNT Value 13-12

Network Configurations and Shared Access NonStop SQL/MP DDL

Operations 13-12

Network Validation and Considerations 13-13

RDF Re-Initialization in a Network Environment 13-13

Network Master Subsystem Initialization 13-13

Non Network Master Subsystem Initialization 13-14

RDF Networks and ABORT or STOP RDF Operations 13-14

RDF Networks and Stop-Update-to-Time Operations

13-15

Sample Configurations

13-15

Sample Network Master Configuration 13-15

Sample Non Network Master Configuration 13-17

RDFCOM STATUS Display 13-19

14. Process-Lockstep Operation

Starting a Lockstep Operation 14-2

The DoLockstep Procedure 14-2

Including the DoLockstep in COBOL85 Applications 14-2

Invoking DoLockStep by way of TAL 14-2

DoLockStep Execution 14-3