Table 3 Supported System and Data Center Combinations
Data Center A | Data Center B | Data Center C | Serviceguard Version | |
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1 | 1 | 1 | Arbitrator Node | A.11.16 or later |
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1 | 1 | Quorum Server System | A.11.16 or later | |
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2 | 1 | 2 | Arbitrator Nodes | A.11.16 or later |
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1 | 2 | 2 | Arbitrator Nodes | A.11.16 or later |
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2 | 2 | 1 | Arbitrator Node | A.11.16 or later |
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2 | 2 | 2* Arbitrator Nodes | A. 11.16 or later | |
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2 | 2 | Quorum Server System | A. 11.16 or later | |
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3 | 3 | 1 | Arbitrator Node | A. 11.16 or later |
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3 | 3 | 2* Arbitrator Nodes | A. 11.16 or later | |
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3 | 3 | Quorum Server System | A.11.16 or later | |
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4 | 4 | 1 | Arbitrator Node | A.11.16 or later |
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4 | 4 | 2* Arbitrator Nodes | A.11.16 or later | |
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4 | 4 | Quorum Server System | A.11.16 or later | |
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5 | 5 | 1 | Arbitrator Node | A.11.16 or later |
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5 | 5 | 2* Arbitrator Nodes | A.11.16 or later | |
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5 | 5 | Quorum Server System | A.11.16 or later | |
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6 | 6 | 1 | Arbitrator Node | A.11.16 or later |
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6 | 6 | 2* Arbitrator Nodes | A.11.16 or later | |
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6 | 6 | Quorum Server System | A.11.16 or later | |
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7 | 7 | 1 | Arbitrator Node | A.11.16 or later |
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7 | 7 | 2* Arbitrator Nodes | A.11.16 or later | |
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7 | 7 | Quorum Server System | A.11.16 or later | |
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8 | 8 | Quorum Server System | A.11.16 or later | |
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*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 Serviceguard Quorum Server Release Notes for
Site Aware Failover Configuration
While configuring a Serviceguard package, the node names are ordered by preference to run the package. The first node in the list is the primary node for running the package and the subsequent
26 Designing a Metrocluster