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

# cmapplyconcl -C <Continental_cluster_config_file_name>
You have now configured an application in the 3DC solution. At any point in time, you can
preview the data replication storage failover on any node in the 3DC solution using the
procedure mentioned in “Previewing the Data Replication Storage Failover by Using cmdrprev”
(page 140). It is also recommended to verify the setup during the planned downtime for
maintenance using the procedures mentioned in the sections “Testing the application startup
at the recovery cluster” (page 141) and “Testing Continentalclusters Recovery Using cmrecovercl
in the Recovery Cluster” (page 142).
Deploying a Complex Workload in Three Data Center Solution using
SADTA
This section describes the procedures to configure a complex workload in a Three Data Center
(3DC) solution using the Site Aware Disaster Tolerant Architecture (SADTA).
Overview of Deploying a Complex Workload in 3DC using SADTA
Site Aware Disaster Tolerant Architecture (SADTA) enables deploying complex workloads in a
cluster. Complex workloads are applications configured using multi-node and failover packages
with dependencies. This complex workload is a multi-instance application that uses active resources
across multiple nodes in a cluster. These workloads are configured using multiple, interdependent
multi-node packages or failover packages. These packages that comprise a complex workload
need to be managed and moved collectively for disaster recovery. SADTA includes crucial
components such as the Site Controller Package and the Site Safety Latch that manage the complex
workload configuration. The Site Controller Package is a special failover package that is created
using the dts/sc module. Each complex workload that is configured using SADTA must have a
corresponding Site Controller Package. The Site Safety Latch is an internal mechanism that is
created for each Site Controller Package. It is created automatically on all the cluster nodes when
the corresponding Site Controller Package configuration is applied in the cluster. The Site Safety
Latch prevents the inadvertent simultaneous startup of the workload configuration on both sites.
SADTA is extended to support 3DC configurations. This enables deploying complex workloads in
a 3DC solution. This solution specifies a method to configure and move complex workloads across
three data centers, while using P9000 or XP Continuous Access 3DC replication technology for
replicating data.
Figure 42 shows the package view of a complex workload configuration in a 3DC solution using
SADTA. It shows three sites - Site1, Site2 and Site3. A Metrocluster is configured with Site1 and
Site2 and an independent Serviceguard cluster is configured at Site3. Continentalclusters is
configured with the Metrocluster as the primary cluster and the independent Serviceguard cluster
at Site3 is configured as the recovery cluster. A Serviceguard cluster at Site 3 is configured with
only one site defined in the cluster configuration.
126 Designing a Three Data Center Disaster Recovery Solution