Building Disaster Recovery Serviceguard Solutions Using Metrocluster with Continuous Access for P9000 and XP A.11.00

For information on configuring the RAID Manager configuration files in the primary and recovery
cluster, see “Creating Device Group Pairs” (page 131).
Creating Device Group Pairs
After configuring the Raid Manager configuration files on all nodes in the primary and recovery
cluster, you must create Continuous Access device group pairs. An application configured for an
3DC solution may contain either three or two device group pairs based on Tri-Link or Bi-Link
configuration respectively. An application configured for a 3DC solution with Tri-Link configuration
contains three device group pairs; One Continuous Access Sync or Journal device group pair
between DC1 and DC2, Continuous Access-Journal device group pair, and a Delta Resync device
group pair. An application configured for an Three Data Center solution with Bi-Link configuration
contains two device group pairs; Continuous Access Sync or Journal device group pair between
DC1 and DC2, and Continuous Access-Journal device group pair to DC3. All the device group
pair relations must be established prior to the rest of the configurations and normal package
operations.
For more information on creating device group pairs, see “Creating Device Group Pairs ” (page 115).
Configuring Oracle RAC and the Site Controller Package in the primary cluster
This section describes the following procedures:
1. Setting up Oracle RAC redundantly in the primary cluster
2. Configuring the Site Controller Package in the primary cluster
3. Configuring Site Safety Latch Dependencies in the primary cluster
Setting up Oracle RAC redundantly in the primary cluster
The procedure to create RAC database in Metrocluster is identical to the procedure for creating a
RAC database using SADTA. Complete the procedure described in the section “Configuring Oracle
RAC Database in a Site Aware Disaster Tolerant Architecture” to setup the RAC database in both
sites in the primary cluster. The procedure to configure the Site Controller Package in 3DC solution
is different from that of Metrocluster for RAC. Configure the Site Controller Package in the primary
cluster using the procedure mentioned in the section “Configuring Site Controller Package in the
primary cluster”.
Configuring the Site Controller Package in the primary cluster
A Site Controller Package in the primary cluster must be created using the Metrocluster 3DC primary
module dts/primary_xpca3dc along with the Site Controller module dts/sc.
All 3DC parameters must be configured in the Site Controller Package configuration file. There is
no need to edit the Metrocluster environment file. The Metrocluster environment file is automatically
generated on all nodes when this package configuration is applied in the cluster. All parameters
that were previously available in the Metrocluster environment file are now configured from the
package configuration file.
IMPORTANT: Do not delete the Metrocluster environment file that is generated. This file is crucial
for failover and recovery operations in the 3DC environment.
Complete the following procedure on a node in the primary cluster to configure the Site Controller
Package for the RAC database in the primary cluster:
1. Create a Site Controller Package configuration file using the dts/sc and
dts/primary_xpca3dc modules.
# cmmakepkg -m dts/sc –m dts/primary_xpca3dc \
Deploying a Complex Workload in Three Data Center Solution using SADTA 131