Create a metro node distributed device for each of the matching devices existing between cluster-1 and cluster-2. The matching pairs of devices will be used to create a mirrored distributed device and corresponding distributed virtual volume. The virtual volume must be exposed to both Oracle RAC nodes. Once the virtual volume is exposed to the Oracle RAC nodes, they are provisioned in Oracle as any PowerStore volume. See References for further information.
Note: While creating the metro distributed device, Metro will assign the distributed device to a distributed consistency group or rule set and will automatically create a corresponding virtual volume. The virtual volume must be used to access the distributed device and be exposed to both metro clusters and the storage views in each metro cluster that represents the Oracle RAC nodes.
Figure 23. Distributed device and distributed virtual volumes
Note: This section is performed after setting Provision on to Distributed Storage. (See Setting metro node Metro provisioning context)
- In Unisphere for metro node, set View BY to Devices to open the Export Virtual Volumes wizard and display a list of virtual volumes for the distributed devices.
- The Create Distributed Devices wizard starts.
- Set Source Cluster to the cluster that has been chosen to be the active cluster for the Metro configuration. This paper uses cluster-1 as the active cluster for the Metro configuration.
- The wizard populates the Available Top-Level Devices area with the available devices from cluster-1. Click the device. Then, click the right arrow.
- The wizard then flags the device as the top-level device it should use to create the distributed device and mirror. Click NEXT.
- The wizard then prompts for the device from cluster-2 to be used for mirroring the top-level device from cluster-1. Click the top-level device in pane Selected Devices to Mirror. In pane Available Devices to use for Mirroring, click the matching device from cluster-2.
- Click ADD MIRROR.
- The wizard reports the two devices as members of the mirrored device. Click NEXT.
- The wizard prompts when synchronization (mirroring) between the chosen devices occurs. Click Synchronize Data. Then, click NEXT.
- The wizard prompts for either a Distributed Consistency Group or a Device Rule to assign to the mirrored device. When using Oracle, click Select an existing Consistency Group. Then, click the Consistency Group drop-down and select the desired distributed consistency group created in a previous step.
- The wizard displays the action it will take against any device in the distributed consistency group should an outage occur to either metro node cluster or site. Click NEXT.
- Review the request to create the distributed mirrored device. If the request is correct, click FINISH.
- The wizard displays the results of creating the distributed devices. Click CLOSE.
- Unisphere for metro node-Metro redisplays the contents of the Provision Storage tab. Click the refresh button to see the new distributed device.