A customer's business flow is as follows: EIP - ELB - ECS - middleware (Redis & Kafka) - RDS. The cloud service and application are deployed in a single-AZ high-availability environment. The customer has certain cost requirements (RTO&IT: 30 minutes). The customer now needs to plan an application-level disaster recovery scenario. Which of the following solutions cannot meet the requirements?

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A customer's business flow is as follows: EIP - > ELB - > ECS - > middleware (Redis & Kafka) - > RDS. The cloud service and application are deployed in a single-AZ high-availability environment. The customer has certain cost requirements (RTO&IT: 30 minutes). The customer now needs to plan an application-level disaster recovery scenario. Which of the following solutions cannot meet the requirements?

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A. Web service and application service server update frequency: the disaster recovery side can be

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B. Use intelligent DNS services to control business access traffic. Under normal circumstances, 100% of

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C. Customers regularly conduct disaster recovery drills using manual/script methods

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D. Database master-slave disaster recovery, one end is the master and the other end is the backup. For

A customer's business flow is as follows: EIP - > ELB - > ECS - > middleware (Redis & Kafka) - > RDS. The cloud service and application are deployed in a single-AZ high-availability environment. The…

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