What is the process for generation and writing to sitemap files?
Am I right in thinking that the generator gleans all the information first, stores it temporarily, and then writes it to the sitemap files once done?
Also, once it's generated the site map for the first time, and runs again on a daily cron job, does it just look for changes and overwrites the sitemap files if changes to the website have occurred, rather than do a complete new generation process?
Currently my first sitemap generation is into 'Links depth 7' and has been running all night, but the site map files are empty.