We would like to present, on the example of a monolithic application, a case study which is hopeless regarding contemporary trends. We will show you how, in a few simple steps, you can prepare a product for implementation in AWS and implement it so that the monthly costs are lower than in the classic case. We will also present how, implementing WAF (Well-Architected Framework) principles, a project which is difficult to manage and maintain has changed into a modern product based on native AWS services.

Some background information about the application:

• typical customer portal providing invoices and related documents
• number of users: 40,000 (active: 12,000)
• new documents per month: 40,000
• archived documents: 1,600,000, very rare access to the archive after 2 months (about 80 GB of data)
• heaviest load: first 10 days of the month