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

Building an Extended Distance Cluster Using MC/ServiceGuard
Two Data Center Architecture
Chapter 256
DWDM with Two Data Centers
The following is an example of a two data center configuration using
DWDM for both storage and networking.
Figure 2-3 Two Data Centers with DWDM Network and Storage
Advantages and Disadvantages of a Two-Data-Center
Architecture
The advantages of a two-data-center architecture are:
• Lower cost.
• Only two data centers are needed, meaning less space and less
coordination between operations staff.
• No arbitrator nodes are needed.