From time to time we link videos from vendors that offers insight into their thinking on various cloud computing related topics. Here is a video from Rackspace on Private Clouds.
Krishnan Subramanian
Research Analyst
Krishnan Subramanian (a.k.a Krish) is the founder and Principal Analyst of Rishidot Research LLC. He was formerly an editor at CloudAve and now he is focussed only on Rishidot Research and Cloud Fieldnotes.
So RS advocates always maintaing 50% of your resources unallocated so that you can deploy new apps fast….im guessing the video was made before the financial crisis. (yes im an RS customer with a private cloud)