It also means that you need to scale your upload servers (IO & long requests), this is more difficult than trusting S3 to scale for you. However having your S3

It also means that you need to scale your upload servers (IO & long requests), this is more difficult than trusting S3 to scale for you. However having your S3 open to uploads has it's downsides. We at Cloudinary do uploads to our own (autoscaled) instances and only then persist.