RDF System Management Manual
Table Of Contents
- RDF System Management Manual
- What’s New in This Manual
- About This Manual
- 1 Introducing RDF
- RDF Subsystem Overview
- RDF Processes
- RDF Operations
- Reciprocal and Chain Replication
- Available Types of Replication to Multiple Backup Systems
- Triple Contingency
- Loopback Configuration (Single System)
- Online Product Initialization
- Online Database Synchronization
- Online Dumps
- Subvolume- and File-Level Replication
- Shared Access DDL Operations
- EMS Support
- SMF Support
- RTD Warning Thresholds
- Process-Lockstep Operation
- Support for Network Transactions
- RDF and NonStop SQL/MX
- Zero Lost Transactions (ZLT)
- Monitoring RDF Entities With ASAP
- 2 Preparing the RDF Environment
- 3 Installing and Configuring RDF
- 4 Operating and Monitoring RDF
- 5 Managing RDF
- Recovering From File System Errors
- Handling Disk Space Problems
- Responding to Operational Failures
- Stopping RDF
- Restarting RDF
- Carrying Out a Planned Switchover
- Takeover Operations
- Reading the Backup Database
- Access to Backup Databases in a Consistent State
- RDF and NonStop SQL/MP DDL Operations
- RDF and NonStop SQL/MX Operations
- Backing Up Image Trail Files
- Making Online Dumps With Updaters Running
- Doing FUP RELOAD Operations With Updaters Running
- Exception File Optimization
- Switching Disks on Updater UPDATEVOLUMES
- 6 Maintaining the Databases
- 7 Online Database Synchronization
- 8 Entering RDFCOM Commands
- 9 Entering RDFSCAN Commands
- 10 Triple Contingency
- 11 Subvolume- and File-Level Replication
- 12 Auxiliary Audit Trails
- 13 Network Transactions
- Configuration Changes
- RDF Network Control Files
- Normal RDF Processing Within a Network Environment
- RDF Takeovers Within a Network Environment
- Takeover Phase 1 – Local Undo
- Takeover Phase 2 – File Undo
- Takeover Phase 3 – Network Undo
- Takeover Phase 3 Performance
- Communication Failures During Phase 3 Takeover Processing
- Takeover Delays and Purger Restarts
- Takeover Restartability
- Takeover and File Recovery
- The Effects of Undoing Network Transactions
- Takeover and the RETAINCOUNT Value
- Network Configurations and Shared Access NonStop SQL/MP DDL Operations
- Network Validation and Considerations
- RDF Re-Initialization in a Network Environment
- RDF Networks and ABORT or STOP RDF Operations
- RDF Networks and Stop-Update-to-Time Operations
- Sample Configurations
- RDFCOM STATUS Display
- 14 Process-Lockstep Operation
- Starting a Lockstep Operation
- The DoLockstep Procedure
- The Lockstep Transaction
- RDF Lockstep File
- Multiple Concurrent Lockstep Operations
- The Lockstep Gateway Process
- Disabling Lockstep
- Reenabling Lockstep
- Lockstep Performance Ramifications
- Lockstep and Auxiliary Audit Trails
- Lockstep and Network Transactions
- Lockstep Operation Event Messages
- 15 NonStop SQL/MX and RDF
- Including and Excluding SQL/MX Objects
- Obtaining ANSI Object Names From Updater Event Messages
- Creating NonStop SQL/MX Primary and Backup Databases from Scratch
- Creating a NonStop SQL/MX Backup Database From an Existing Primary Database
- Online Database Synchronization With NonStop SQL/MX Objects
- Offline Synchronization for a Single Partition
- Online Synchronization for a Single Partition
- Correcting Incorrect NonStop SQL/MX Name Mapping
- Consideration for Creating Backup Tables
- Restoring to a Specific Location
- Comparing NonStop SQL/MX Tables
- 16 Zero Lost Transactions (ZLT)
- A RDF Command Summary
- B Additional Reference Information
- C Messages
- D Operational Limits
- E Using ASAP
- Index
Contents
HP NonStop RDF System Management Manual—524388-003
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14. Process-Lockstep Operation
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 13-7
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 13-13
Network Validation and Considerations 13-13
RDF Re-Initialization in a Network Environment 13-14
Network Master Subsystem Initialization 13-14
Non Network Master Subsystem Initialization 13-14
RDF Networks and ABORT or STOP RDF Operations 13-15
RDF Networks and Stop-Update-to-Time Operations 13-15
Sample Configurations 13-16
Sample Network Master Configuration 13-16
Sample Non Network Master Configuration 13-18
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 14-3
DoLockStep Execution 14-3
The Lockstep Transaction 14-4
RDF Lockstep File 14-4
Multiple Concurrent Lockstep Operations 14-5
The Lockstep Gateway Process 14-6
NAME 14-6
PROGRAM 14-6
STARTUPMSG 14-6
AUTORESTART 14-6
Disabling Lockstep 14-7