While Using Cron to run the sitemap crawler at midnight, it runs for about 1 to 2 hours and then stops or is shutoff by the server.  Can I setup a second cron job to run the same night a couple of hours later.  Will it continue from where it left off or would it start over.  I know when I use the manual cron link it runs for about 45 minutes and then stops,  I can either hit the refresh on the Chrome or just rehit the link.  The site takes almost 7 hours over running time to finish the sitemap.  Only 3 images on the site,  but there are 16,ooo posts.