Syncing media folders between (windows) servers

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http://serverfault.com – We are running a load balanced cluster of three web servers, all running Windows 2008. On these machines we are hosting a bunch of e-commerce sites, all with several thousands articles. This adds up to about 100k+ media files each, counting all sizes etc. Probably 1.5M+ files in total, of different sizes, ranging from 1kb to 10mb. All "master" files are on a file server (also windows 2008). In the beginning of time, we used a UNC path for including media for the webserver. This was however not a very good idea as traffic started to pickup. We then switched to a periodically running script th (HowTos)