Disaster recovery rehearsal in Continentalclusters

Disaster recovery rehearsal in
Continentalclusters
Technical white paper
Table of contents
Executive summary ............................................................................................................................... 2
Audience ........................................................................................................................................ 2
Terminology .................................................................................................................................... 2
Introduction to DR rehearsal .................................................................................................................. 4
Sample environment to illustrate DR rehearsal ......................................................................................... 6
Existing Continentalclusters setup ....................................................................................................... 6
Software requirements ...................................................................................................................... 7
Hardware requirements .................................................................................................................... 7
Package configuration .......................................................................................................................... 8
Device group configuration changes .................................................................................................. 8
Set up filesystem for the Continentalclusters state directory .................................................................... 8
Configure the monitor package with the shared disk .......................................................................... 10
Rehearsal package configuration ..................................................................................................... 11
Configuring Continentalclusters rehearsal packages as modular packages............................................ 12
Primary package MC environment file .............................................................................................. 16
Continentalclusters configuration ......................................................................................................... 18
Rehearsing recovery in Continentalclusters ............................................................................................ 21
Rehearsing recovery of a Single Instance application ......................................................................... 21
Rehearsing recovery of Oracle 10g RAC application ......................................................................... 23
Rehearsing recovery of Oracle 9i RAC application ............................................................................ 25
Primary site failure during rehearsal ................................................................................................. 27
Rehearsing recovery in the Three Data Center Disaster Recovery Solution (3DC DR Solution) ...................... 29
Configuring rehearsal for the recovery group in a 3DC DR Solution ..................................................... 29
Rehearsing recovery in a 3DC DR solution ........................................................................................ 30
Precautions ....................................................................................................................................... 33
Client access IP address at recovery cluster ....................................................................................... 33
Cleanup of secondary mirror copy ................................................................................................... 33
Cluster role switch during rehearsal .................................................................................................. 33
Rehearsing recovery of Oracle 9i RAC recovery groups ..................................................................... 33
Strengths .......................................................................................................................................... 34
Limitations ......................................................................................................................................... 35
Troubleshooting DR rehearsal problems ................................................................................................ 36
Related documentation ....................................................................................................................... 38

Summary of content (38 pages)