Reducing Latency for S3 Bucket Objects

Answer - A.

This is given as a use case in the documentation.

When to Use CRR.

Cross-region replication can help you do the following.

Comply with compliance requirements-Although Amazon S3 stores your data across multiple geographically distant Availability Zones by default, compliance requirements might dictate that you store data at even greater distances.

Cross-region replication allows you to replicate data between distant AWS Regions to satisfy these requirements.

Minimize latency-If your customers are in two geographic locations, you can minimize latency in accessing objects by maintaining object copies in AWS Regions that are geographically closer to your users.

Increase operational efficiency-If you have compute clusters in two different AWS Regions that analyze the same set of objects, you might choose to maintain object copies in those Regions.

Maintain object copies under different ownership-Regardless of who owns the source object, you can tell Amazon S3 to change replica ownership to the AWS account that owns the destination bucket.

This is referred to as the owner override option.

You might use this option to restrict access to object replicas.

Option B is invalid since this is only used when you want to secure data at rest.

Option C is invalid since this is only used when you want to have a static web site in place.

OptionD is invalid since this will not help reduce latency.

For more information on cross-region replication, please refer to the below URL-

https://docs.aws.amazon.com/AmazonS3/latest/dev/crr.html

Option A: Enable cross region replication for the bucket.

Enabling cross-region replication allows you to automatically replicate data between S3 buckets in different regions. This can be useful for disaster recovery purposes or for reducing latency for users in different regions. In this scenario, enabling cross-region replication could reduce the latency of access to objects for users in the new country by replicating the objects to a bucket in a region that is closer to them.

Option B: Enable Encryption for the bucket.

Enabling encryption for the bucket will not directly reduce latency for users in the new country. However, it is still a best practice to enable encryption to protect sensitive data and meet compliance requirements.

Option C: Host a static web site.

Hosting a static website in S3 bucket can be useful for reducing latency for users in different regions. By hosting the website in an S3 bucket in the same region as the user, the latency can be reduced. However, this option assumes that the application can be modified to use a static website instead of the existing application.

Option D: Change the storage class.

Changing the storage class will not directly reduce latency for users in the new country. However, it may reduce costs and optimize performance based on the access pattern of the objects. For example, if the objects are infrequently accessed, changing the storage class to S3 Glacier may be more cost-effective. If the objects are frequently accessed, changing the storage class to S3 Standard-Infrequent Access may be more cost-effective.

Overall, Option A is the best option for reducing latency for users in the new country. However, it's important to consider the cost implications of cross-region replication and ensure that the replication configuration is set up correctly to avoid data inconsistencies.