Deployment Configuration Advice for TiTiler on ECS Fargate: Gunicorn vs. Uvicorn Workers

[AbhishekD15]

Hi everyone,

I’m currently working on deploying TiTiler as a Docker container to AWS ECS Fargate. The service processes a 600 GB COGTiff file, dynamically generating tiles. Since this is a CPU-intensive process, I want to ensure the deployment configuration is both efficient and scalable.

Specifically, I’m seeking advice on the best approach for managing workers:

Option 1: Using Uvicorn with a single worker and relying solely on Auto Scaling for handling increased load.
Option 2: Using Gunicorn with multiple Uvicorn workers to leverage multiprocessing and also using Fargate auto scaling strategy.
While researching, I couldn’t find a clear comparison or best practices for TiTiler in such scenarios. I’m curious if:

Uvicorn-only setups can scale efficiently on Fargate for CPU-heavy workloads.
There are advantages of Gunicorn with Uvicorn workers for this use case, especially when dealing with large geospatial files like COGTiffs.
Has anyone faced a similar situation or found reliable resources discussing this? Any guidance, best practices, or links to relevant documentation would be greatly appreciated.

Thanks in advance for your help!