Aids for capacity planning?

Hi,

Are there any resources (Templates, tools, etc) that a sys admin would use to perform a capacity planning study? I am going to setup some servers on the cloud but I need to know how many I will need for my usage patterns (e.g. whether some can be consolidated or not), and the memory etc required.

Thanks

From serverfault blade

• Im from GISstackexchange, and was hunting around for something else and saw this Q. Although, this Capacity Planning tool spreadsheet is specifcally for ArcGIS Server, may have some use for someone else who comes across this Q. Very detailed, and has videos on how to fill it in.

  From Simon