Which replication solution is MOST operationally efficient?
Add a replication rule to the source bucket and specify the destination bucket. Create a bucket policy for the destination bucket to allow the owner of the source bucket to replicate objects.
Schedule an AWS Batch job with Amazon EventBridge to copy new objects from the source bucket to the destination bucket. Create a Batch Operations IAM role in the destination account.
Configure an Amazon S3 event notification for the source bucket to invoke an AWS Lambda function to copy new objects to the destination bucket. Ensure that the Lambda function has cross-account access permissions.
Run a scheduled script on an Amazon EC2 instance to copy new objects from the source bucket to the destination bucket. Assign cross-account access permissions to the EC2 instance’s role.
Explanations:
This option uses S3 replication, which is designed for operational efficiency. By adding a replication rule to the source bucket, all new objects and existing versions are automatically replicated to the destination bucket. The bucket policy allows cross-account access, simplifying the permissions management. This solution minimizes manual intervention and ensures that data is continuously replicated without additional overhead.
Scheduling an AWS Batch job to copy objects introduces complexity and operational overhead. While it can be configured to run at intervals, it does not provide real-time replication. Additionally, managing Batch jobs and IAM roles adds unnecessary complexity compared to direct S3 replication. This method is less efficient for ongoing replication.
While using S3 event notifications with Lambda can work, it requires additional setup for cross-account permissions and may have limitations in handling large data volumes. Lambda functions also have execution time limits and can incur additional costs with increased invocations, making it less operationally efficient than native S3 replication.
Running a scheduled script on an EC2 instance involves more operational overhead and maintenance. It requires managing an EC2 instance, ensuring it runs properly, and handling potential failures. This approach lacks the seamless automation provided by S3 replication, making it less efficient for ongoing data replication.
From what I’ve heard, the answer is:
Add a replication rule to the source bucket and specify the destination bucket. Create a bucket policy for the destination bucket to allow the owner of the source bucket to replicate objects.