Building Disaster Recovery Serviceguard Solutions Using Metrocluster with EMC SRDF

To configure the SGeRAC Cluster Interconnect packages:
1. Create a package directory on all the nodes in the site.
# mkdir -p /etc/cmcluster/pkg/sfo_ic
2. Create a package configuration file and control script file. Use site-specific names for the files.
You must follow the legacy package creation steps.
# cmmakepkg -p sfo_ic.conf
# cmmakepkg -s sfo_ic.cntl
3. Specify a site-specific package name in the package configuration file.
4. Specify only the nodes in the site for the node_name parameter.
5. Specify the package type as MULTI_NODE.
6. Specify the SGeRAC Cluster Interconnect as CLUSTER_INTERCONNECT_SUBNET.
7. Save and apply the package configuration file.
# cmapplyconf –P sfo_ic.conf
Configuring and administration restrictions
Following are the configuration and administration restrictions that apply to SADTA configurations
for application workloads:
• Only two sites can be configured in Metrocluster configuration.
• All Serviceguard restrictions that apply to site configurations also apply to configuring
Metrocluster for RAC.
• For a RAC database that is configured in Metrocluster for RAC, the redundant database
configuration at each site sub-cluster must have the same number of instances.
• When using Veritas CVM, each CVM disk group must be configured with a Modular package
at both sites.
Configuring Oracle RAC database with ASM in a SADTA
Automatic Storage Management (ASM) is a feature in Oracle Database 10g and 11g that provides
the database administrator with a simple storage management interface that is consistent across
all server and storage platforms. In Metrocluster, Oracle RAC with ASM is configured using SADTA.
Figure 24 (page 120) illustrates two Oracle RAC databases that are replicas of every other, are
configured one at every cluster in Continentalclusters with SADTA. The database workload at every
cluster has its own Site Controller package and Site Safety Latch. The arrows in the figure indicate
the package dependencies.
Configuring Oracle RAC database with ASM in a SADTA 119