Designing Disaster Recovery Clusters using Metroclusters and Continentalclusters, Reprinted October 2011 (5900-1881)

cmapplyconf -P <backedup_application_config>
e. Get the current configuration of the Site Controller. Modify the Site Controller configuration
with the new set of packages that need to be managed on the recovery site. Leave the
set of packages that are being managed on the primary site as it is.
3. Start the Site Controller again on the primary site.
4. Halt the Site Controller package on the primary site. This will halt all the complex workload
packages that are running on the primary site.
5. Restart the Site Controller on the recovery site. The complex workload will start up on the
recovery site using the new modular SMS CFS/CVM packages.
6. Halt the Site Controller that is running on the recovery site in DETACH mode.
7. Repeat step 2 that was performed on the recovery site initially, on the primary site.
8. Start the Site Controller again on the recovery site.
You can either continue the Site Controller package to run on the recovery site or move it back
to the primary site.
Administering Metrocluster for RAC
This section elaborates the procedures that need to be followed to administer Metrocluster for RAC.
This section addresses the following topics:
• “Online Addition and Deletion of Nodes” (page 400)
• “Starting a Disaster Tolerant Oracle Database 10gR2 RAC” (page 402)
• “Shutting Down a Disaster Tolerant Oracle Database 10gR2 RAC” (page 403)
• “Halting and Restarting the RAC Database MNP Packages” (page 403)
• “Maintaining Oracle Database 10gR2 RAC MNP packages on a Site” (page 403)
• “Maintaining Oracle Database 10gR2 RAC” (page 404)
• “Moving a Site Aware Disaster Tolerant Oracle RAC Database to a Remote Site” (page 404)
Online Addition and Deletion of Nodes
Metrocluster requires equal number of nodes to be configured at the primary and remote data
centers. Therefore, whenever a RAC database instance is added or deleted at primary site, you
must add or delete the replica database instance at the remote site as well.
Online node addition involves procedures on both the sites of the redundant RAC database
configuration.
1. Online node addition on the primary site where the RAC database package stack is running.
2. Online node addition on the remote site where the RAC database package stack is down.
Similarly, online node deletion also involves performing the following tasks.
1. Online node deletion on the primary site where the RAC database package stack is running.
2. Online node deletion on the remote site with where the RAC database package stack is down.
NOTE: It is recommended to add or delete nodes online when the Site Controller Package is
halted in the DETACH mode.
Adding Nodes Online on a Primary Site where the RAC Database is Running
Complete the following procedure to add nodes online on a primary site where the RAC database
package stack is running:
1. Install the required software on the new node and prepare the node for Oracle installation.
2. Halt the Site Controller Package in the DETACH mode to avoid unnecessary site failover of
the RAC database.
400 Designing a Disaster Recovery Solution Using Site Aware Disaster Tolerant Architecture