RDF System Management Manual

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Table Of Contents

RDF System Management Manual
What’s New in This Manual
About This Manual
1 Introducing RDF
- RDF Subsystem Overview
  - Unplanned Outages With ZLT
  - Unplanned Outages Without ZLT
  - Tips for Executing Fast Business Takeover Operations
  - Planned Outages
  - Features
  - User Interfaces
  - Tasks
- RDF Processes
  - Primary System Processes
  - Backup System Processes
- RDF Operations
  - Monitor Process
  - Extractor Process
  - Receiver Process
  - RDFNET Process
  - Updater Processes
  - Purger Process
- Reciprocal and Chain Replication
- Available Types of Replication to Multiple Backup Systems
  - RDF Control Subvolume
- 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
- Configuring Hardware for RDF Operations
- Preparing Software and Database Files for RDFOperations
- Using SMF With RDF
  - Configuring an SMF Environment on the Primary System
  - Configuring an SMF Environment on the Backup RDF System
3 Installing and Configuring RDF
- Preparing the Primary System
  - Stopping the Software
  - Preparing the Tables and Files
- Preparing the Backup System
  - Synchronizing the Primary and Backup Databases
  - Backing Up Application Programs and Files
- Installing RDF
- Initializing and Configuring TMF
  - TMF Subsystem Not Running Previously
  - TMF Subsystem Running Previously
- Initializing and Configuring RDF
- Enabling RDF Operations
4 Operating and Monitoring RDF
- Running RDFCOM
- Running RDFSCAN
- Performing Routine Operational Tasks
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
  - Performing Non-Shared Access DDL Operations
  - Performing Shared Access 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
- Understanding Database States
- Backing Up Altered Database Structures
  - NonStop SQL/MP or NonStop SQL/MX Databases
  - Enscribe Databases
- Resynchronizing Databases
7 Online Database Synchronization
- Overview
- Synchronizing Entire Databases Online
  - Considerations When Synchronizing Entire Databases
  - Example of Synchronizing An Entire Database Online
- Synchronizing Selected Database Portions Online
  - Overview
  - Partial Database Synchronization Issues
- Phases of Online Database Synchronization
  - Extractor Phases
  - Updater Phase 2
- Extractor Restart Considerations During Online Database Synchronization
- When Is Online Database Synchronization Complete?
  - Extractor Messages
  - Updater Messages
8 Entering RDFCOM Commands
- Command Description Elements
- File Names and Process Identifiers
- Command Overview
9 Entering RDFSCAN Commands
- About the EMS Log
- Command Description Elements
- AT
- DISPLAY
- EXIT
- FILE
- HELP
- LIST
- LOG
- MATCH
- NOLOG
- SCAN
10 Triple Contingency
- What Is It?
- What’s Required?
- How Does It Work?
- Hardware Requirements
- Software Requirements
- The RETAINCOUNT Configuration Parameter
- The COPYAUDIT Command
- COPYAUDIT Restartability
- Using ZLT to Achieve Triple Contingency Protection for Auxiliary Audit Trails
  - Triple Contingency Without ZLT
  - Using ZLT to Achieve the Same Protection
- Summary
11 Subvolume- and File-Level Replication
- INCLUDE Clauses
- EXCLUDE Clauses
- Wildcard Character (*)
  - Within Subvolume Names
  - Within Filenames
- INCLUDE and EXCLUDE Processing
- Error Checking
- Performance Ramifications
- Summary Examples
12 Auxiliary Audit Trails
- Auxiliary Extractor
- Auxiliary Receiver
- Configuring Extractors and Receivers
  - Error conditions
- Configuring Image Trails
- Configuring Updaters
  - Error Conditions
- STOP TMF Ramifications
- Takeover Ramifications
- Usage of Master and Auxiliary Audit Trails
- Using Expand Multi-CPU Paths
13 Network Transactions
- Configuration Changes
- RDF Network Control Files
- Normal RDF Processing Within a Network Environment
- RDF Takeovers Within a Network Environment
- Network Configurations and Shared Access NonStop SQL/MP DDL Operations
- Network Validation and Considerations
- RDF Re-Initialization in a Network Environment
  - Network Master Subsystem Initialization
  - Non Network Master Subsystem Initialization
- RDF Networks and ABORT or STOP RDF Operations
- RDF Networks and Stop-Update-to-Time Operations
- Sample Configurations
  - Sample Network Master Configuration
  - Sample Non Network Master Configuration
- 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
  - Creating the Fuzzy Copy on the Primary System
  - Creating the Fuzzy Copy on the Backup System
- 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
  - Example
- Comparing NonStop SQL/MX Tables
16 Zero Lost Transactions (ZLT)
- How It Works
- Using CommitHoldMode
- Hardware Setup
- Assigning CPUs on the Standby System
- RDF Configuration Attributes
- ZLT Takeover Operations
- Recovering the Primary System After an RDF ZLT Takeover
- ZLT and RDF Networks
- STOP TMF Operations
  - During Normal Operations
  - During ZLT Takeover Processing
- SQL Shared Access DDL Operations
A RDF Command Summary
- RDFSCAN Commands
- File Names and Process Identifiers
B Additional Reference Information
- Default Configuration Parameters
- Sample Configuration File
- RDFSNOOP Utility
- RDF System Files
- RDF File Codes
C Messages
- About the Message Descriptions
- RDF Messages
- RDFCOM Messages
- RDFSCAN Messages
D Operational Limits
E Using ASAP
- Architectural Overview
- Installation
- Auto Discovery
- Monitoring Specific RDF Environments
- Adding and Removing RDF Environments
- Version Compatibility
- RDF Metrics Reported by ASAP
Index

Contents

HP NonStop RDF System Management Manual—524388-003

5. Managing RDF

Performing Routine Operational Tasks 4-18

Displaying Current Configuration Parameters and Operating Statistics 4-19

Changing Configuration Parameters 4-23

Reading Log Messages 4-24

5. Managing RDF

Recovering From File System Errors 5-2

Handling Disk Space Problems 5-6

Responding to Operational Failures 5-6

Communication Line Failures 5-7

Processor Failures 5-8

TMF Audited Volume Crash 5-10

TMF Subsystem Crash on the Primary System 5-10

TMF Subsystem Crash on the Backup System 5-11

File Recovery on the Primary System 5-12

File Recovery on the Backup System 5-12

Stopping RDF 5-13

Stopping RDF by Stopping TMF 5-14

Stopping RDF From the Primary System 5-15

Stopping RDF From the Backup System 5-17

Restarting RDF 5-18

Carrying Out a Planned Switchover 5-18

Standard Configurations 5-18

Using a Reverse Trigger 5-19

Reciprocal Configurations 5-19

Takeover Operations 5-21

The RDF Takeover Operation 5-21

Preparing for Takeover Processing 5-22

Issuing the TAKEOVER Command 5-22

Monitoring Takeover Outcome 5-23

Takeover Failure 5-24

Takeover and File Recovery 5-24

Checking Exception Files for Uncommitted Transactions 5-25

Preparing for Application Processing on the Backup System 5-26

Restoring the Primary System 5-26

Reading the Backup Database 5-27

Access to Backup Databases in a Consistent State 5-28