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

Disaster Tolerance and Recovery in an MC/ServiceGuard Cluster

Types of Disaster Tolerant Clusters

Chapter 1 25

Metropolitan cluster architecture is shown in Figure 1-4.

Figure 1-4 Metropolitan Cluster

A key difference between extended distance clusters and metropolitan

clusters is the data replication technology used. The extended distance

cluster uses FibreChannel and HP-UX supported software mirroring.

Metropolitan clusters provide extremely robust data replication based on

the capabilities of the HP StorageWorks E Disk Array XP series or the

EMC Symmetrix array.

node 1

node 2

pkg A

pkg B

node 3

node 4

pkg C pkg D

Data Center A

Data Center B

High Availability Network

Robust Data Replication

High Availability Network

West San Francisco

East San Francisco

arbitrator 1 arbitrator 2

Third Location

Arbitrators