Replication Object multi Region

Amazon S3 Cross-Region Replication (CRR)

What is Cross-Region Replication?

Amazon S3 Cross-Region Replication (CRR) is a feature that automatically replicates objects across buckets in different AWS regions. This provides geographic redundancy and helps meet compliance requirements while improving data availability and disaster recovery capabilities.

Key Benefits

• Disaster Recovery: Protect against regional outages and disasters
• Compliance: Meet regulatory requirements for geographic data distribution
• Latency Reduction: Serve content from regions closer to users
• Data Sovereignty: Keep copies of data in specific geographic locations
• Operational Excellence: Maintain business continuity across regions

How CRR Works

When CRR is configured:

• Objects are automatically copied to destination buckets in different regions
• Replication occurs asynchronously, typically within 15 minutes
• Object metadata, ACLs, and tags are preserved during replication
• Versioning must be enabled on both source and destination buckets
• IAM roles provide necessary permissions for the replication process

AWS Well-Architected Framework

AWS Well-Architected helps you build secure, high-performing, resilient, and efficient infrastructure. Based on 6 main pillars, with the Reliability pillar being the focus of this lab.

To ensure the Reliability of the system, objects stored in the S3 bucket in Singapore Region (ap-southeast-1) should be replicated to another region for redundancy and disaster recovery.

Region Selection Criteria

When choosing a destination region for replication, consider these factors:

• Compliance: Regulatory requirements for data location
• Latency: Distance to end users for performance optimization
• Cost: Data transfer and storage costs vary by region
• Services and Features: Availability of required AWS services
• Disaster Recovery: Geographic separation for risk mitigation

For this lab, we will select the destination region based primarily on cost optimization while maintaining adequate geographic separation.

• -> So Region N. Virginia (us-east-1) with S3 cost: 23.55 USD for 1TB per month - 2.05 USD cheaper than Region Singapore (ap-southeast-1) is a suitable choice for the criteria Cost. You can double check the cost at the official page of AWS Pricing Calculator

1. Next we will create a new buecket

   • In the S3 bucket interface, select Create bucket

   

   • In the Bucket name field, type aws-first-cloud-journey-cross
   • In the AWS region section, select US East (N. Virginia) us-east-1

   

   • Keep the default values, scroll to the bottom of the page, select Create bucket

   

2. Replicate files between Buckets in different Regions

   • In the Amazon S3 interface, select bucket aws-first-cloud-journey

   

   • Select Management

   

   • Scroll down to the middle of the page, select Create replication rule

   

   • In the Replication rule name section, enter PrimaryToSecondary
   • In Status section, keep Enabled
   • In the Choose a rule scope section, select Apply to all objects in the bucket, which means this config will be applied to all objects in the bucket.
   • In the Destination section, select Choose a bucket in this account
     • Note: As you can see, we can choose the function Specify a bucket in another account which means copying data to a bucket belonging to another AWS account, however within the framework of this lab, We just choose the solution of copying data to another bucket but still in the current AWS account.
   • In the Bucket name section, select Browse S3

   

   • Check the circle symbol to select Bucket: aws-first-cloud-journey-cross, select Choose path

   

   • At this time, the Amazon S3 service requires you to enable the versioning feature to continue configuration. You can review the lab 8. BUCKET VERSIONING to understand this concept further.

   • Select Enable bucket versioning

   

   • In the IAM role section, keep the default Choose from existing IAM roles
   • Select the triangle symbol -> the value table appears -> select Create new role

   

   • Keep the remaining default values.
   • Scroll to the bottom of the page in the Additional replication options section, select Replication Time Control (RTC), which 3 RTC replicates most objects that you upload to Amazon S3 in seconds, and 99.99 percent of those objects within 15 minutes
   • Select Save

   

   • In the section, Replicate existing objects?, select No, do not replicate existing objects., which means only start copying newly uploaded objects to Bucket in region Singapore via Bucket in region N.Virginia

   

3. Check S3 bucket aws-first-cloud-journey-cross

   • In the interface, S3 bucket aws-first-cloud-journey-cross in region N. Virginia, you can see that there are no objects in this bucket yet

   

4. Upload new file to S3 bucket AWS First Cloud Journey

   • At the S3 bucket interface AWS First Cloud Journey, select Upload

   • Open the window containing the folders, files downloaded and extracted in step 2.2

   • Select the images folder -> choose any photo -> upload to the AWS First Cloud Journey bucket by dragging and dropping

   

   • At the Upload interface, in the Files and folders section, the blog-3.jpg file appears, scroll to the bottom of the page and select Upload

   

   • The upload file has been completed, select Close to return to the bucket interface

   

5. Check the Replication feature

   • In the S3 interface, select bucket aws-first-cloud-journey-cross in region N. Virginia

   

   • Check Object

   • Noted: If the Object has not appeared, please be patient for a few minutes and refresh the page

   

   • -> An Object has appeared

   • Select the square symbol in front of the object blog-3.jpg, select Open

   

   • Result:

   

   • -> Similar to the image file you uploaded to S3 bucket AWS First Cloud Journey in step 4

   • => Congratulations on completing the object replication lab between S3 buckets in 2 different Regions