A company has developed an eCommerce web application in Oracle Cloud Infrastructure.
What should they do to ensure that the application has the highest level of resilience?
Click on the arrows to vote for the correct answer
A. B. C. D.C.
To ensure that an application has the highest level of resilience in Oracle Cloud Infrastructure (OCI), the application should be deployed across multiple Availability Domains (ADs) and Fault Domains (FDs). Therefore, the correct answer to this question is B.
An Availability Domain (AD) is a physically separate data center within a region that is isolated from other ADs with independent power and cooling. Deploying an application across multiple ADs ensures high availability, scalability, and fault tolerance. If one AD fails, the application can failover to another AD, minimizing downtime.
A Fault Domain (FD) is a logical group of hardware and infrastructure within an AD that shares common points of failure, such as power or network connectivity. Deploying an application across multiple FDs within an AD further enhances the application's resilience by reducing the likelihood of a single point of failure.
Deploying the application across multiple Virtual Cloud Networks (VCNs) (answer A) does not guarantee resilience because all VCNs in a region reside in the same AD by default.
Deploying the application across multiple Regions and Availability Domains (ADs) (answer C) provides an even higher level of resilience, but this approach can increase costs significantly and introduce additional complexity.
Deploying the application across multiple Availability Domains and subnets (answer D) may improve availability, but it does not address the issue of FDs, which provide an additional layer of fault tolerance.
Therefore, deploying the application across multiple Availability Domains and Fault Domains is the best approach for ensuring the highest level of resilience in Oracle Cloud Infrastructure.