Amazon ECS/SQS/lambda/

Good morning everyone,

I am just starting in the AWS world and I have a challenge that I need to solve with the most appropriate tools that AWS offers me.

The use case is the following: I have to process some pdf documents add some images to them and send it back. Currently I am doing it with a microservice that receives a pdf and returns it modified. When I do load tests the queue receives 50 requests and in the bash task I get blocked with 9 pdf at the same time and the ECS crashes.

One solution is to increase the capacity of the ECS so that the microservice can process more documents. But I have read that SQS can help me solve this so I want to be sure I am applying the right architecture:

• I have a .net core microservice in docker that produces requests and sends them to the queue.

• I have an SQS that receives requests and arranges them in order of arrival.

• I have a lambda that listens to the SQS and when a new request arrives it fires the event to the consuming microservice (the lambda "fires" up to 10 times simultaneously and in each "firing" it lets only 1 document through, or they recommend that in each "firing" it lets 10 documents through).

• The consuming microservice receives a message from the lambda and starts processing all the SQS requests until all of them are finished.

• When finished and the SQS is emptied the lambda again is waiting for the SQS to have a new message and the cycle starts again.

Overview: I have a microservice is publisher. The microservice is consumer The lambda is the trigger The SQS is the queue