An online stock trading application is deployed to multiple Availability Domains in the us-phoenix-1 region.
Considering the high volume of financial transactions that the trading application handles, the company has hired you to ensure that the data stored by the application is scalable, highly-available, and disaster resilient.
In the event of failure, the Recovery Time Objective (RTO) must be less than 2 hours to meet regulatory compliance requirements.
Which Disaster Recovery strategy should be used to achieve the RTO requirement in the event of system failure? (Choose the best answer.)
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A. B. C. D.A.
To achieve the Recovery Time Objective (RTO) requirement of less than 2 hours in the event of system failure for an online stock trading application deployed to multiple Availability Domains in the us-phoenix-1 region, a disaster recovery strategy that provides scalability, high availability, and disaster resilience is required. Let's evaluate the options provided to determine the best approach:
A. Configure your application to use synchronous master-slave data replication between Availability Domains.
This option involves replicating data synchronously between master and slave nodes across Availability Domains to ensure high availability and resilience. However, this approach may not provide adequate scalability in the event of a large-scale disaster or sudden increase in demand, as it relies on a single master node to handle all updates to the data.
B. Configure hourly block volumes backups through the Storage Gateway service.
This option involves using the Storage Gateway service to configure hourly backups of block volumes, which can be used to restore the system in the event of a failure. While this approach provides some level of resilience, it may not be adequate to meet the RTO requirement of less than 2 hours, as it could take some time to restore the system from backups.
C. Store hourly block volumes backup to NVME device under a compute instance and generate a custom image every 5 minutes.
This option involves storing backups of block volumes to a high-speed NVME device under a compute instance and generating a custom image every 5 minutes. This approach provides a high level of resilience and can help meet the RTO requirement of less than 2 hours, as it enables fast recovery from backups.
D. Configure hourly block volumes backups using the Oracle Cloud Infrastructure (OCI) Command Line Interface (CLI).
This option involves using the OCI Command Line Interface (CLI) to configure hourly backups of block volumes, which can be used to restore the system in the event of a failure. While this approach provides some level of resilience, it may not be adequate to meet the RTO requirement of less than 2 hours, as it could take some time to restore the system from backups.
Based on the above analysis, option C appears to be the best approach to achieve the RTO requirement of less than 2 hours in the event of system failure. This option provides a high level of resilience and enables fast recovery from backups by storing them on a high-speed NVME device and generating custom images every 5 minutes.