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

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 \
/etc/cmcluster/hrdb_sc/hrdb_sc.config
2. Edit the hrdb_sc.config file and specify the following:
• Name for the package_name attribute - package_name hrdb_sc
• Names of the nodes explicitly using the node_name attribute.
• The Site Controller Package directory for the dts/dts/dts_pkg_dir attribute
—dts/dts/dts_pkg_dir /etc/cmcluster/hrdb_sc
This is the package directory for this Site Controller Package. The Metrocluster environment
file is automatically generated for this package in this directory.
• Specify a name for the log file —
script_log_file /etc/cmcluster/hrdb_sc/hrdb_sc.log
• Specify the sites without any packages
Do not specify any packages using the critical_package or managed_package
attributes.
site site1
site site2
• Edit the following Metrocluster 3DC parameters:
◦ 3DC_TOPOLOGY
◦ DC1_NODE_LIST
◦ DC2_NODE_LIST
◦ DC3_NODE_LIST
◦ DC1_DC2_DEVICE_GROUP
◦ DC2_DC3_DEVICE_GROUP
◦ DC1_DC3_DEVICE_GROUP
◦ DC1_DC2_DEVICE_GROUP_MU
◦ DC2_DC3_DEVICE_GROUP_MU
◦ DC1_DC3_DEVICE_GROUP_MU
◦ FENCE
Deploying a Complex Workload in Three Data Center Solution using SADTA 453