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

Cascading Failover in a Continental Cluster
Chapter 8 363
8 Cascading Failover in a
Continental Cluster
This chapter shows how to create a configuration that allows cascading
failover between two sites that are connected via ContinentalClusters.
Cascading failover is the ability of an application to fail from a primary
to a secondary location, and then to fail to a recovery location on a
different site. The primary location contains a metropolitan cluster built
with MetroCluster EMC SRDF, and the recovery location has a standard
MC/ServiceGuard cluster. The solution will support up to 16 nodes in the
primary cluster and 16 nodes in the recovery cluster.
This chapter has the following sections:
• Overview
• Data Storage Setup
• Primary Cluster Package Setup
• Recovery Cluster Package Setup
• Continental Cluster Configuration
• Data Replication Procedures
It is assumed that readers are already familiar with MC/ServiceGuard
configuration tasks, continental cluster installation and configuration
procedures, EMC Symmetrix, BCV, SRDF, Symmetrix multi-hop
concepts, and Symmetrix Command Line Interface (SymCLI)
configuration and use.
NOTE This chapter is only for users of ContinentalClusters with the EMC
Symmetrix disk array.