I am looking to deploy a Python Flask app on an AWS EC2 (Ubuntu 20.04) instance. The app fetches data from an S3 bucket (in the same region as the EC2 instance) and performs some data processing.

I prefer using s3fs to achieve the connection to my S3 bucket. However, I am unsure if this will allow me to leverage the 'free data transfer' from S3 to EC2 in the same region - or if I must use boto directly to facilitate this transfer?

My app works when deployed with s3fs, but I would have expected the data transfer to be much faster - so I am wondering that perhaps AWS EC2 is not able to "correctly" fetch data using s3fs from S3.

CodePudding user response：

All communication between Amazon EC2 and Amazon S3 in the same region will not incur a Data Transfer fee. It does not matter which library you are using.

In fact, communication between any AWS services in the same region will not incur Data Transfer fees.