I recently encountered an issue where a client with a web server cluster was having difficulty keeping every node’s copy of their sitemap up-to-date, and wanted to know if all the search engines’ sitemap bots would follow a 301 redirect on the sitemap itself to a master server with a different domain than the site for which the sitemap is authored.
I doubted that we could trust that redirects on sitemaps would necessarily be followed by every service which supports them. I asked Google’s Matt Cutts about it, and he offered the following suggestions: