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GCP Professional Data Engineer Practice Question

Your company hosts an ecommerce database in a Cloud SQL for PostgreSQL instance located in us-central1. The SLA requires that the application continue to operate with less than 30 seconds of data loss if the primary zone becomes unavailable, and that the service can be manually recovered in another region within 5 minutes if an entire region fails. Write latency must stay low during normal operation. Which architecture should you implement to meet these objectives?

  • Create a Cloud SQL regional (high-availability) instance in us-central1 and add an asynchronous cross-region read replica in us-east1; monitor the replica and promote it if the primary region fails.

  • Use a Cloud SQL regional (high-availability) instance in us-central1 and replicate updates to a Memorystore for Redis cluster in us-east1 for cross-region failover.

  • Keep a single-zone Cloud SQL instance in us-central1 and schedule hourly exports to Cloud Storage replicated to us-east1; restore the latest export if the primary region fails.

  • Migrate the database to Cloud Bigtable with multi-zone replication and stream changes from the existing Cloud SQL instance using Database Migration Service.

GCP Professional Data Engineer
Maintaining and automating data workloads
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