HP worked with Microsoft to set up a pretty amazing private cloud for use during the Microsoft Management Summit 2011.   Word from inside HP is it they designed and setup these racks in 7 days (from palette to the show).

According to the blog post from the Microsoft Virtualization team….

…after a few days of running thousands of VMs in hundreds labs without issue and seeing that the hardware wasn’t being taxed, the team was very curious to see how just how many virtual machines they could provision. So, one night after the labs were closed the team decided to see how many VMs they could run…

• 7,200 VMs running across 32 blade servers

• 225 VMs running per Hyper-V host where each host has 128 GB of physical memory. Here’s an example of where Hyper-V Dynamic Memory improved density by over 100%.

Here’s a video with an overview of the setup from Scott Farrand @ HP.

This is truly “doing amazing”.