Preparing a Serviceguard Cluster for Metrocluster Continuous Access EVA

When the following procedures are completed, an adoptive node will be able to access the data belonging to a package after it fails over.

Setting up the Storage Hardware

1.Before configuring Metrocluster Continuous Access EVA, the EVA must be correctly cabled with redundant paths to each node in the cluster that will run packages accessing data on the array.

2.Install and configure the hardware components of the EVA, including HSV controllers, disk arrays, SAN switches, and Management Server.

3.Install and configure CV EVA and SMI-S EVA on the Management Server. For the installation and configuration process, refer to the HP StorageWorks Command View EVA Installation Guide.

4.Start CV EVA User Interface (CV EVA-UI). You can configure virtual disks and DR groups using the CV EVA web user interface shown in Figure 35.

Figure 35 Configuration of Virtual Disks and DR groups

For more detailed information on setting up Command View EVA for configuring, managing and monitoring your HP StorageWorks Enterprise Virtual Array Storage System, refer to the HP StorageWorks Command View EVA User Guide.

After a DR group is created, only the source volume (primary volume) is visible and accessible with Read/Write mode. The destination volume (secondary volume) by default is not visible and accessible to its local hosts. The destination volume access mode needs to be changed to Read-only mode before the DR group can be used. The destination volumes need to be presented to its local host.

NOTE: In the Metrocluster Continuous Access EVA environment, it is required that the destination volume access mode be set to read-only mode.

The destination Vdisk read-only mode can be changed by using the SSSU command for HP-UX. When executing the SSSU command, it needs to be executed against the storage cell that holds the source Vdisk of the DR group.

For users who are not familiar with the SSSU command, an input sample file is provided below and in the following location: /opt/cmcluster/toolkit/SGCAEVA/Samples/ sssu_sample_input. In the sample file, DC-1 is the name of the source array.

select manager 15.13.244.182 user=administrator pass=administrator select system DC-1

set DR_GROUP “\Data Replication\DRG_DB1” accessmode=readonly ls DR_GROUP “\Data Replication\DRG_DB1”

216 Building Disaster Recovery Serviceguard Solutions Using Metrocluster with Continuous Access EVA