Building Disaster Recovery Serviceguard Solutions Using Metrocluster with EMC SRDF

2 Configuring an application in a Metrocluster solution
Installing the necessary software
Before you begin any configuration, ensure the following software is installed on all the nodes:
• Symmetrix EMC Solutions Enabler software that allows the management of the Symmetrix
disks from the node.
• If you are building an M by N configuration using RDF Enginuity Consistency Assist (RDF-ECA),
you must install only Symmetrix EMC Solutions Enabler. You do not have to install any other
software.
• Before you begin any configuration, ensure the following software is installed on all the nodes:
Serviceguard◦
◦ Metrocluster with EMC SRDF
◦ MCDREnabler Toolkit
Preparing the Cluster for data replication
When you complete the following procedures, an adoptive node will be able to access the data
belonging to a package after it fails over. Use the convenience scripts in the /opt/cmcluster/
toolkits/SGSRDF/Samples to automate some of the tasks in the following sections:
• mk3symgrps.nodename—to create EMC Symmetrix device groups.
• mk4gatekpr.nodename— to create gatekeeper devices.
• mk2imports— to import volume groups.
• ftpit— to copy the configuration to other nodes in the cluster.
• pre.cmquery— to split SRDF links before applying the package configuration.
• post.cmapply— to restore SRDF links after applying the package configuration.
These scripts must be copied from /opt/cmcluster/toolkits/SGSRDF to another directory,
such as /etc/cmcluster/SRDF.
Building the Symmetrix CLI database
You must install the Symmetrix CLI (Command Line Interface) on all the nodes running packages
that use data on the EMC Symmetrix disk arrays. Create the EMC Solutions Enabler database on
each system using the following steps. (See, Symmetrix EMC Solutions Enabler manual).
After the software is installed, on each node you must run the following command:
# symcfg discover
This builds the CLI database on the node.
Display what is in the EMC Solutions Enabler database.
• symdg list
• symld -g symdevgrpname list
• symgate list
If the EMC Solutions Enabler database is not configured, the following error message is displayed:
The Symmetrix configuration could not be
loaded for a locally attached Symmetrix
12 Configuring an application in a Metrocluster solution