Exam CV0-003 topic 1 question 74 discussion

B. Implement backups to cloud storage and infrastructure as code to provision the environment automatically when the on-premises site is down. Restore the data from the backups. Explanation: Cost Efficiency: This approach avoids the expense of running a continuously active cloud environment by utilizing cloud storage for backups, which is generally cheaper than maintaining a fully replicated environment. Automated Provisioning: Using infrastructure as code allows for quick and efficient deployment of resources when needed, reducing the RTO to the required one hour by automating the recovery process. Backup Restoration: By performing regular backups to cloud storage, the RPO can be met at eight hours by ensuring that data is up to date within that timeframe.

This option provides a balance of cost-effectiveness, performance, and disaster recovery capabilities. While other options might address some aspects of the requirements, they either incur higher costs or do not fully meet the RTO and RPO objectives

C is more expensive than B. With C, you're paying for two operational websites 100% of the time.

Option B is the only one that deals with recovery from a failure of the application (RPO/RTO). Auto-scaling and load balancing and CDNs are about performance and availability, not recovery.

Option A: Creates a full cloud replica, duplicating on-premises costs. Option B: Incurs regular backup costs and requires manual infrastructure provisioning, increasing complexity and potential human error. Option D: While CDNs reduce load on the origin server, manually deploying instances and uploading backups on demand can be labor-intensive and expensive.

C. Implement a website replica in the cloud with auto-scaling using the smallest possible footprint. Use DNS to shift the load from on-premises to the cloud.

C: Implement a website replica in the cloud with auto-scaling using the smallest possible footprint.

Key is static files and small DB, can be easily backed up very frequently. Infrastructure as code is used to efficiently raise new instances for getting back to service, thus reducing the RTO and RPO.