Dual-Service Domains With Virtual I/O Configuration
This example uses logical domains implemented using Oracle VM Server for SPARC to partition and virtualize the system.
Using two service domains to provide services to a guest domain increases the availability and reliability of the guest domain. If a fault occurs in one service domain, the guest can be configured to automatically continue to receive services. This configuration has these features:
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Enables the maximum amount of availability within a single server.
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Enables the use of IPMP for virtual network and MP groups for virtual disk.
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Enables load balancing of the I/O among the service domains.
The following diagram shows the basic layout of the dual service domain with virtual I/O configuration. The control domain is the domain labeled Primary service domain. You can add up to 126 guest domains to this configuration. Or, you can create additional dual service domain configurations with NPRDs that provide services to additional guest domains. The total number of possible NPRDs depends on the number of available root complexes and CPU cores, the amount of available memory, and especially, the requirements of the workload in each domain.
