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Reducing downtime during Cumulative Updates installation SharePoint/Project Server 2013

I found a very interesting blog post from Russ on how to reduce a Cumulative Update installation from 5 hours to 16 minutes.

https://blogs.msdn.com/b/russmax/archive/2013/04/01/why-sharepoint-2013-cumulative-update-takes-5-hours-to-install.aspx