Sometimes you’re in script/console and you make a change to your model files, but since Ruby on reads the models when the environment loads, your change isn’t reflected right away in your script/console environment. This will explicitly tell Ruby to reload the environment from scratch. Unfortunately you’ll loose any local variables which were assigned too.
it is still possible to host your sitemap on external S3 buckets. You must set up a subdomain of your domain pointed as an Alternative Domain Name for your CloudFront distribution, and in order to do this you must go through domain verification with AWS.