About configuring a parallel global cluster using Volume Replicator (VVR) for replication


About configuring a parallel global cluster using Volume Replicator (VVR) for replication
Prev	Configuring global clusters with VVR and Storage Foundation Cluster File System High Availability, Storage Foundation for Oracle RAC, or Storage Foundation for Sybase CE	Next

Configuring a global cluster for environment with parallel clusters using Volume Replicator requires the coordination of many component setup tasks. The tasks listed below are guidelines.

Before configuring two clusters for global clustering, you must verify that:

You have the correct installation options enabled for your Storage Foundations and High Availability (SFHA) Solutions product, whether you are using keyless licensing or installing keys manually. You must have the GCO option for a global cluster and VVR enabled.

Review your product requirements and licensing information.
Both clusters have your SFHA Solutions product software installed and configured.

See Configuring the primary site.

See Configuring the secondary site.

Note:

You can install and configure both clusters at the same time, or you can configure the second cluster at a later time than the first.

You you can use this guide to configure a global cluster environment and replication between the two clusters. For installation and configuration information:

See the Storage Foundation Cluster File System High Availability Configuration and Upgrade Guide.

See the Storage Foundation for Oracle RAC Configuration and Upgrade Guide.

See the Storage Foundation for Sybase ASE CE Configuration and Upgrade Guide.

With two clusters installed and configured , you are ready to configure a global cluster environment using VVR. You must perform the following tasks to modify both cluster configurations to support replication in the global cluster environment.

Table: Tasks for configuring a parallel global cluster with VVR

Task	Description
Setting up replication on the primary site	Create the Storage Replicator Log (SRL) in the disk group for the database. Create the Replicated Volume Group (RVG) on the primary site.
Setting up replication on the secondary site	Create a disk group to hold the data volume, SRL, and RVG on the storage on the secondary site. You must match the names and sizes of these volumes with the names and sizes of the volumes on the primary site. Edit the /etc/vx/vras/.rdg file on the secondary site. Use resolvable virtual IP addresses that set network RLINK connections as host names of the primary and secondary sites. Create the replication objects on the secondary site.
Starting replication of the database.	You can use either of the following methods to start replication: Automatic synchronization Full synchronization with Storage Checkpoint
Configuring VCS for replication on clusters at both sites.	Configure Cluster Server (VCS) to provide high availability for the database: Modify the VCS configuration on the primary site Modify the VCS configuration on the secondary site

Once the global clusters and replication with VVR are configured, the following replication use cases are supported for it:

Migration of the role of the primary site to the remote site
Takeover of the primary site role by the secondary site
Migrate the role of primary site to the secondary site
Migrate the role of new primary site back to the original primary site
Take over after an outage
Resynchronize after an outage
Update the rlink to reflect changes

See Replication use cases for global parallel clusters.