Eco smart Utilization" watt/performance graphs help your $/perf
Wednesday Aug 22, 2007
You will be mislead if you look at graphs of watts that do not show "zero watts" to "maximum watts". The graph below makes it appear that you start at max watts and go down all the way as your utilisation decreases.
Below is a graph that is more like what modern servers can do with the latest power saving features.
Poor graphs to make changes look bigger than they are.
Finding where to save money actually requires a different graph. One
needs to look at "watts per unit of work" which equates to
"watts per performance". Looking at the graph below it now becomes
quit quite clear how to save watts, you need to have your server at over
50% utilization even if you have the latest power-saving technology.
This was discussed yesterday in this blog.
You can see in this graph that five servers running at 10% utilisation uses 1200 watts/unit-of-work versus one server running at 50% utilisation only uses 400 watts/unit-of-work. The 10% case requires 3 times more power to do the same amount of work!
Get eco smart, drive up your utilisation through good policy, or the correct use of consolidation and/or virtualisation.
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"quit clear how to save watts" ... I thi...
thanks fixed.