Designing Disaster Tolerant High Availability Clusters, 10th Edition, March 2003 (B7660-90013)

Building a Metropolitan Cluster Using MetroCluster/SRDF
Preparing a Cluster for MetroCluster/SRDF
Chapter 4 139
Preparing a Cluster for MetroCluster/SRDF
When the following procedures are completed, 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 should be copied from /opt/cmcluster/toolkits/SGSRDF
to another directory, such as /etc/cmcluster/SRDF.
Installing the Necessary Software
Before any configuration can begin, you need to make sure the following
software is installed on all nodes:
• Symmetrix SymCLI command line interface that allows you to
manage the Symmetrix disks from the node.
• Symmetrix PowerPath software if you are building an M by N
configuration.
• MetroCluster with Symmetrix SRDF should be installed on all nodes
according to the instructions in the MetroCluster with EMC SRDF
Release Notes.
Setting up Hardware for 1 by 1 Configurations
Ensure that the Symmetrix disk arrays are correctly cabled using PV
links to each node in the cluster that will run packages that access data
on the Symmetrix.