By solely leveraging AWS managed services, each service emits its own set of metrics into Amazon CloudWatch, where customers can monitor for errors.

For public facing services (such as the UI), Amazon Cognito is used to ensure secure access to the core applications and services - this includes role-based access controls. Provisioned API endpoints are also secured with appropriate access, authentication, and authorization controls to ensure use by allowed systems and users. For other AWS services, AWS Identity and Access Management (IAM) role-based access controls are leveraged to ensure least privileged access between services.

The AWS managed services used in this architecture support secure communication by encrypting data in transit. Where data is stored (such as Amazon Redshift and Amazon S3), data is also encrypted at rest.

This architecture leverages managed services that are designed to be highly available by default. Some services (such as Amazon Redshift) can also be configured to be deployed over multiple availability zones. Each component in this architecture is designed to maintain availability in the event of disaster events. AWS managed services are designed to span multiple availability zones. Other services, like Amazon Redshift, can also be deployed over multiple availability zones. In the case of availability zone failure, services deployed can continue to operate.

Scalable and highly available services like Amazon S3, Amazon Kinesis, AWS Glue and Amazon Redshift are purposefully built for data analytics workloads.

This architecture follows a serverless-first approach. Where possible, serverless services scale according to load to ensure you only pay for what is used. In addition, AWS managed services are used that allow for utility billing.  

Data transfer is a consideration for any data-orientated architecture. In this solution, the biggest data volume is ingested from source systems which is generally uncharged in the inbound direction. Data transfer for AWS SFTP file transfers, API Gateway requests, and Amazon AppFlow data are charged as per the documented service pricing. All other data is kept within the region for processing to minimize transfer charges.

AWS managed services help to scale up and down according to business requirement and traffic, and are inherently more sustainable than on-premises solutions. Additionally, leveraged serverless components automate the process of infrastructure management and make it more sustainable.