Unlike metropolitan and campus clusters, which
have a single-cluster architecture, a continental cluster uses
multiple Serviceguard clusters to provide application recovery over
wide areas. Using the Continentalclusters product, two independently
functioning clusters are set up in such a way that in the event
of a disaster, one cluster can take over
the critical operations formerly carried out by the other
cluster.
Disaster tolerance is obtained by eliminating the cluster
itself as a single point of failure. This chapter describes the
configuration and management of a basic continental cluster through
the following topics:
For a description of the cascading failover configuration
using ECM Symmetrix, see Chapter 6. Refer to Appendixes E and F
for additional information on the Continentalclusters command set
and on configuration file parameters. For details of the cascading
failover using HP StorageWorks disk arrays contact your HP representative.
NOTE: This chapter only briefly addresses data replication,
highly available WANs, and site security and communication. Chapters
5 and 6 give details on physical data replication using the HP StorageWorks
E Disk Array XP Series with Continuous Access XP and the EMC Symmetrix with
the SRDF facility. Information on logical data replication via the Oracle
Standby Database is available from your HP representative. Also see
the “White Papers” area on web page http://docs.hp.com/hpux/ha.
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