A few weeks back, I was fortunate enough to speak in front of a group of very smart technology and non technology entrepreneurs.
One of my slides mentioned that cloud hosting is green. Someone pointed out from within the group that there is no study to prove that cloud hosting is green. A very excited conversation followed which completely digressed from the issue raised in the first place.
So, here are my two cents on the topic.
Is cloud hosting green?
Let us take the case of a data center, using traditional hosting technology, which houses the online applications of, say 5000 customers at an average of 2 servers per customer. So the total servers running in the data center is 10,000.
Let us take the carbon emissions from 1 server be equal to x
Then the carbon emissions from 10,000 servers equals 10,000 x
Therefore the per customer carbon foot print for the data center is 10,000 x / 5000 or equal to 2 x
Now, let us switch to cloud hosting.
Since cloud hosting works on virtualization and the on-demand computing model, the server utilization in a cloud hosting enabled data center will be better than in the former’s case. Let us consider that the inventory optimization factor for these 5000 customers is 5:3.5. This means that the same 5000 customers will only need a total of 7000 servers in a cloud computing / cloud hosting environment rather than 10,000.
So, the total carbon footprint will be 7000 x
As a consequence, the per customer carbon foot print becomes 7000 x / 5000 or equal to 1.4 x
This means a reduction in carbon foot print of 35%!
The numbers could be different for different users/customers/applications – more for some and less for some. But the result would be the same: A reduction in carbon foot print happens when you use cloud hosting.




system or software behind it. It is instantly provisioned & readily scalable and has a Pay As You Go model.
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