I have a site that requires I manually create a new sitemap (weekly) as content changes. This is not a problem.
What I'm concerned about is how i'm maintaining the files on the site once submitted. I have searched for a while and don't see a best practices on the subject.
What i'm doing now is simply dating the xml file and storing it at the root of my site (www.mydomain.com/122712.xml for example).
then, i submit this to google, and after a few days it is completely indexed. perfect.
my question is whether this is a good idea--to constantly re-submit new index file names--or should i simply keep resubmitting a file like sitemap.xml, writing over the older one.
if it seems like a good idea to continue on with how i've been doing it--with unique names--how often should i be deleting the old maps? immediately after submitting the new one? as soon as the new one is completely indexed?
if new file names is a bad idea, then must i re-submit the new sitemap.xml file to google to get it to recrawl the changed content? or will it do so on its own.