[vl]

In case of large-scale cluster management, data storage and execution technologies Microsoft chose the same path as Google and bunch of other companies - they develop and use these technologies in house, but do not distribute them to the public.

You can see some such technologies "leaking" to public through Windows Azure on this Dryad release from MS Research, but these are side cases.

Michael Isard (one of the Dryad guys on the linked page) published a paper on Autopilot (Microsoft internal cluster management software) in 2007, but you can't buy Autopilot even now.