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Answer: Migrate the databases to Bare Metal Solution for Oracle.
Given the requirements of minimal code changes, high availability (HA) similar to Oracle RAC, and support for low latency network for legacy applications, the best option is to migrate the databases to Bare Metal Solution for Oracle. This solution provides direct access to Oracle databases on Google Cloud with the same performance and availability as on-premises, including support for Oracle RAC and Data Guard. Cloud Spanner (A) is a globally distributed database and may require significant code changes. Cloud SQL with a standby database (B) offers HA but not the same level as Oracle RAC. Compute Engine with regional persistent disks (C) provides HA but lacks the specific Oracle RAC and Data Guard features. Therefore, D is the correct choice for maintaining the existing HA and disaster recovery setup with minimal changes.
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What is the recommended solution for migrating legacy Oracle 12c databases with Oracle RAC for high availability and Oracle Data Guard for disaster recovery to Google Cloud, ensuring minimal code changes, equivalent high availability, and low-latency network support for the applications?
A
Migrate the databases to Cloud Spanner.
B
Migrate the databases to Cloud SQL, and enable a standby database.
C
Migrate the databases to Compute Engine using regional persistent disks.
D
Migrate the databases to Bare Metal Solution for Oracle.