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Fault Tolerance
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Using High-Availability Data Replication (Enterprise/Workgroup Editions)
In This Chapter
Planning for HDR
Configuring a System for HDR
Meeting Hardware and Operating-System Requirements
Meeting Database and Data Requirements
Meeting Database Server Configuration Requirements
Database Server Version
Storage Space and Chunk Configuration
Using Non-default Page Sizes in an HDR Environment
Mirroring
Physical-Log Configuration
Dbspace and Logical-Log Tape Backup Devices
Logical-Log Configuration
HDR Configuration Parameters
Configuring HDR Connectivity
Starting HDR for the First Time
Decreasing Setup Time Through an Alternate Backup Method
Performing Basic Administration Tasks
Changing Database Server Configuration Parameters
Backing Up Storage Spaces and Logical-Log Files
Changing the Logging Mode of Databases
Adding and Dropping Chunks and Storage Spaces
Renaming Chunks
Saving Chunk Status on the Secondary Database Server
Using and Changing Mirroring of Chunks
Managing the Physical Log
Managing the Logical Log
Managing Virtual Processors
Managing Shared Memory
Replicating an Index to the Secondary Database Server
Changing the Database Server Mode
Changing the Database Server Type
Monitoring HDR Status
Using Command-Line Utilities
onstat -g dri
oncheck -pr
Using SMI Tables
Using ON-Monitor (UNIX)
Restoring Data After Media Failure Occurs
Restoring After a Media Failure on the Primary Database Server
Restoring After a Media Failure on the Secondary Database Server
Replicating An Index to the Secondary Server
Restarting HDR After a Failure
Restarting After Critical Data Is Damaged
Critical Media Failure on the Primary Database Server
Critical Media Failure on the Secondary Database Server
Critical Media Failure on Both Database Servers
Restarting If Critical Data Is Not Damaged
Restarting After a Network Failure
Restarting If the Secondary Database Server Fails
Restarting If the Primary Database Server Fails
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