Help Locating Deprecated AWS Three-Tier Application Documentation

I apologize, but I don't have specific information about the exact document you're referring to or why it might have been removed. However, I can provide some general information about three-tier architecture on AWS and suggest some alternative resources that might be helpful.

The three-tier architecture is indeed a popular and well-established pattern for building applications, consisting of presentation, logic, and data tiers. This architecture remains relevant and is still widely used in AWS deployments.

While the specific document you're looking for may no longer be available, AWS continues to provide information and guidance on implementing multi-tier architectures. Here are some key points about three-tier architectures on AWS:

1. The presentation tier typically handles user interactions and can be implemented using web or mobile applications.

2. The logic tier processes user requests, performs calculations, and interacts with the data tier. This can be implemented using services like Amazon EC2 or AWS Lambda for serverless applications.

3. The data tier stores crucial information and can be implemented using services like Amazon RDS or DynamoDB.

AWS offers various services that can be used to implement each tier, providing scalability, security, and cost-effectiveness. For example, you can use Auto Scaling with EC2 instances to handle varying loads in the application tier.

While the specific document you're looking for may not be available, AWS regularly updates its documentation and resources. You might find similar information in current AWS whitepapers, documentation, or workshop materials related to application architectures. The AWS Architecture Center or AWS Prescriptive Guidance might also provide relevant information on best practices for deploying multi-tier architectures.

If you're specifically interested in serverless implementations, AWS provides guidance on using services like Amazon API Gateway and AWS Lambda to create serverless multi-tier applications, which can simplify the process of building scalable logic tiers.

I recommend checking these current AWS resources for up-to-date information on implementing three-tier architectures in AWS. If you need specific technical details, you may want to consult the documentation for individual AWS services that are commonly used in three-tier architectures, such as EC2, RDS, and Elastic Load Balancing.
Sources
Community | 3-Tier AWS Architecture: The Blueprint for my Application
Introduction - AWS Serverless Multi-Tier Architectures with Amazon API Gateway and AWS Lambda
Three-tier architecture overview - AWS Serverless Multi-Tier Architectures with Amazon API Gateway and AWS Lambda
An overview of traditional web hosting - Web Application Hosting in the AWS Cloud

The link you posted doesn't go to AWS documentation but instead to an AWS Workshop which is an AWS-hosted learning environment. It's likely the content was deprecated; you should check the AWS Workshops portal for an equivalent.

Failing that, check out the links posted above about three-tier architecture, and check out AWS Architecture Blog, "Building a three-tier architecture on a budget."