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

Building a Metropolitan Cluster Using MetroCluster/CA
Designing a Disaster Tolerant Architecture for use with MetroCluster/CA
Chapter 376
* Configurations with two arbitrators are preferred because they provide
a greater degree of availability, especially in cases when a node is down
due to a failure or planned maintenance. It is highly recommended that
two arbitrators be configured in Data Center C to allow for planned
downtime in Data Centers A and B.
The following is a list of recommended arbitration methods for
MetroCluster solutions in order of preference.
• 2 arbitrator nodes, where supported
• 1 arbitrator node, where supported
• Quorum Server with APA
• Quorum Server
For more information on Quorum Server, refer to the MC/ServiceGuard
Quorum Server Version A.01.00 Release Notes for HP-UX.
66Quorum
Server System
A.11.13 or later
7 7 1 Arbitrator
Node
A.11.13 or later
7 7 2* Arbitrator
Nodes
A.11.13 or later
77Quorum
Server System
A.11.13 or later
88Quorum
Server System
A.11.13 or later
Table 3-2 Supported System and Data Center Combinations (Continued)
Data Center
A
Data Center
B
Data Center
C
ServiceGuard
Version