Disaster Recovery Storage Options

D.

Google recommends using different storage options based on the specific use case and requirements. In the scenario you provided, the goal is to store application backup files for disaster recovery purposes while following recommended practices.

Option A: Multi-Regional Storage - This storage option provides low latency and high availability for frequently accessed data. It is suitable for applications that require high performance and low latency. However, it is also the most expensive storage option.

Option B: Regional Storage - This option provides the same level of durability and availability as Multi-Regional Storage, but it is less expensive. It is suitable for applications that require high durability and availability within a specific region.

Option C: Nearline Storage - This storage option provides low-cost storage for data that is not frequently accessed but needs to be immediately available when accessed. It is suitable for backup and recovery use cases where data needs to be accessed within seconds to minutes.

Option D: Coldline Storage - This storage option is designed for long-term data retention, and data access is infrequent, typically measured in months. It is suitable for backup and archive use cases where data is accessed infrequently.

Given the use case of storing backup files for disaster recovery purposes, it is important to consider both cost and accessibility. While Multi-Regional Storage and Regional Storage provide high availability and durability, they may not be the most cost-effective options for this use case. Nearline Storage provides low-cost storage and immediate access, making it a suitable option for backup and recovery use cases. Therefore, the recommended storage option for this use case is C. Nearline Storage.