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How do you enable cross-region replication in S3?

By enabling cross-region replication, you can automatically and asynchronously duplicate objects from an S3 bucket located in one region into another S3 Bucket in a completely different region. Data redundancy is achieved, as well as disaster recovery and increased data availability. This is especially useful when you need to replicate data across multiple regions. AWS Classes in Pune

Here's a step-by-step tutorial on how to enable Amazon S3 cross-regional replication:

Step 1. Pre-requisites

  1. You need an AWS account that has permissions to create S3 buckets, and configure replication.
  2. It is beneficial to be familiar with AWS Management Console (or AWS CLI) or AWS CLI.

Step 2 - Create the buckets for source and destination

  1. Login to the AWS Management console.
  2. Click on the S3 service.
  3. Create two S3 buckets: one for the source region, and another for destination.
  4. Choose the buckets according to your needs.

Step 3 - Enable versioning in the buckets

  1. Select the bucket source in the AWS Management Console.
  2. Click on "Versioning" under the "Properties tab."
  3. Versioning can be enabled for the source bucket.
  4. Repeat the steps to fill the bucket. AWS Course in Pune

Step 4: Create a role for IAM replication

  1. In the AWS Management console, click on the IAM service (Identity and Access Management).
  2. Create a role in IAM with the permissions necessary to enable replication across regions.
  3. Attach the following IAM Policies to the role:AmazonS3FullAccess - This allows the role to access all S3 resources.
    AmazonS3ReplicationRole (to allow cross-region replication)

Step 5 - Configure the replication configuration

  1. Select the bucket source in the AWS Management Console.
  2. Click on the "Management tab" and then "Replication."
  3. Click the "Add Rule" button to create new replication configuration.
  4. Provide a unique rule name.
  5. Choose the bucket as the source and select the options you want to replicate (e.g. all objects, prefixes or tags).
  6. Select the destination bucket in the "Destination section" and then select the region.
  7. Optionally, you can enable/disable encryption during replication.
  8. Select the IAM role that you created in step 4 by selecting it from the dropdown menu.
  9. Click "Save" to create a replication configuration.

Step 6 - Test the replication

  1. Upload a sample object into the source bucket.
  2. Monitoring the replication status of the object in AWS Management Console will ensure that the object is successfully replicated into the bucket destination. AWS Training in Pune

Step 7: Make sure you have the right permissions and access controls

  1. Make sure the IAM roles that are associated with buckets have permissions for accessing the objects and performing replication.
  2. Use bucket policies or access control lists (ACLs), to manage the access control for both source and destination buckets.

That's all! Now that you have enabled cross-region replicating in Amazon S3, objects uploaded into the source bucket are automatically replicated in the destination bucket within the specified destination region. This allows for data redundancy as well as improved data durability between regions.

Remember that enabling cross region replication can incur additional costs due to the data transfer costs between regions as well as storage costs at the destination. Before implementing cross region replication, always review AWS documentation and your specific use case.