Adding 50k+ permanent redirects

Hi,

We have a customer with around 50k products in their old site (not Litium). We have a way of mapping old url -> new url in a large excel sheet. Our first idea for handling this would be to add all of these to the built-in redirect handler in BO, but would like to ask if there are any general recommendations against these types of volumes, or if anyone has experience with importing this many rows? Open to do the actual import in batches of course, but will it cause performance issue on the site once imported?

Litium version: 8.15

You are not as lucky as the old URL containing the article number?

Unfortunately not, there is nothing in the url itself that we can use to figure out which product it is.