I have been preparing for the migration of the Dolphin site to UNA for several months. My website with dolphin has about 10,000 users and about 100,000 images.
I have a test site with Una. When I do the migration, the first time an image has to be displayed, the page waits for that image to be generated. This only happens the first time the image has to be generated. The problem occurs when you have to generate many images for the first time, this causes a server error.
If I perform the migration under these conditions, the server will constantly crash until all the images are generated again, which will be very annoying for my users. Is there a way to regenerate the images in bulk?