You have a mission-critical application that must be globally available at all times.
If this is the case, which of the below deployment mechanisms would you employ?
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A. B. C. D.Answer - D.
Regions represent different geographical locations and are suitable for hosting your application across multiple regions for disaster recovery.
For more information on AWS Regions, please refer to the below URL:
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.htmlFor a mission-critical application that must be globally available at all times, deploying to multiple regions is the best option.
Explanation:
Deployment to multiple edge locations: Edge locations are used for content delivery and caching, and they are not suitable for hosting a mission-critical application that must be globally available at all times. Deploying to edge locations is a good option when your application is content-heavy and you need to improve user experience by caching content closer to the user, but it does not ensure high availability.
Deployment to multiple Availability Zones: Availability Zones are physically separate data centers within the same region, and they are designed to be isolated from each other to ensure high availability. Deploying your application to multiple Availability Zones within the same region ensures that your application can withstand failures in one Availability Zone without affecting the availability of your application. However, deploying to multiple Availability Zones in the same region is not enough to ensure global availability, as a failure in the region itself could still affect the availability of your application.
Deployment to multiple Data Centers: Deploying your application to multiple data centers is a good option when you need to ensure high availability within a specific region. However, deploying to multiple data centers in different regions is a better option when you need to ensure global availability.
Deployment to multiple Regions: Deploying your application to multiple regions ensures global availability and reduces the risk of downtime caused by a disaster that affects a single region. When you deploy your application to multiple regions, you ensure that your application is available to users even if one or more regions become unavailable.
Therefore, for a mission-critical application that must be globally available at all times, deploying to multiple regions is the best option.