This may not be the level of specificity that you're looking for, but http://research.google.com/pubs/pub43438.html http://research.google.com/pubs/pub43438.htm

This may not be the level of specificity that you're looking for, but http://research.google.com/pubs/pub43438.html http://research.google.com/pubs/pub43438.html and http://research.google.com/pubs/pub41684.html http://research.google.com/pubs/pub41684.html are what I know google has published about their cluster management systems.