Designing Disaster Recovery Clusters using Metroclusters and Continentalclusters, Reprinted October 2011 (5900-1881)

Copying the Storage Map File
After running the smispasswd and evadiscovery commands to generate the /etc/dtsconf/
caeva.map file, copy this file to all cluster nodes so that they can be used by Metrocluster
Continuous Access EVA to communicate with the EVA units. Be sure to use the same full pathname.
Displaying Information about Storage Devices
Use the evadiscovery command to display information about the storage systems and DR groups
in your configuration. Example:
# evadiscovery -l
% MC EVA Storage Systems and DR Groups map list:
Storage WWN: 5000-1FE1-5000-4280
DR Group Name: DR Group - PkgA
DR Group Name: DR Group - PkgB
Storage WWN: 5000-1FE5-5000-4288
DR Group Name: DR Group - PkgA
DR Group Name: DR Group - PkgB
NOTE: Before running the evadiscovery command, the management server configuration
must be completed using the smispasswd. Otherwise, the evadiscovery command, will fail.
NOTE: Run the discovery tool after all storage DR Groups are configured or when there is any
change to the storage device. For example, the user removes and recreates a DR group that is
used by an application package. In this case the DR Group's internal IDs are regenerated by the
EVA system. Update the external configuration file if any name of storage systems or DR groups
is changed, run the evadiscovery utility, and redistribute the map file /etc/dtsconf/caeva.mapto
all Metrocluster clustered nodes.
Verifying the EVA Configuration
Use the following checklist to verify the configuration.
Figure 36 EVA Configuration Checklist
Configuring Volume Groups
This section describes the required steps to create a volume group for use in a Metrocluster
Continuous Access EVA environment. To configure volume groups, it is required to get the device
special files for the DR Group's source and target VDisks on nodes in both the sites. Use the steps
outlined below to identify the device special files for the DG VDisks on a node.
NOTE: While using Cluster Device Special Files (CDSF) feature, the device special file name will
be the same on all nodes for a source and target VDisk.
Identifying Special Device File Name for Vdisk in DR Group using Secure Path V3.0D or V3.0E
For each Vdisk in a DR group use CV EVA to retrieve its own unique World Wide Name (WWN)
identifier. To identify the special device file name for the matching WWN identifier in a single
clustered node use:
# spmgr display
Preparing a Serviceguard Cluster for Metrocluster Continuous Access EVA 223