You are asked to design a Maximum Availability Solution for a RAC configuration that provides for
continuous availability for the Oracle database and which can survive instance failures, node
failures, data failures, and site failures. The RAC configuration has a four-node cluster with five
different services configured. Performance must be maintained for any failure situation for all the
services, and all data must be preserved. All the servers in the configuration will have the same
hardware. Which configuration would you recommend?
A.
Asymmetric RAC and Dataguard configuration with a mixture of RAC and single instances
using ASM at all sites with the same service preferences
B.
Asymmetric RAC and a Physical Standby Database in a Dataguard configuration with RAC and
ASM at all sites with the same number of instances but different service preferences
C.
Asymmetric RAC and a Logical Standby Database in a Dataguard configuration with RAC and
ASM at all sites with the same number of instances but different service preferences
D.
Symmetric RAC and a Physical Standby Database in a Dataguard configuration with RAC and
ASM at all sites with the same number of instances and the same service preferences