Going Green Through Computer Virtualization
At work, I often see lots of servers being under utilized because they have a dedicated application running on them. It seems like a waste since many of these server machines aren’t being fully used to their full potential as many of the applications only have a few users on at a time. There are ways to save money at your work and also conserve energy by using few server machines.
Photo by JOHNNIE W@LKER.
A concept that has been getting popular as computer get faster and have large hard drives is virtualization. The basic idea behind virtualization is that a virtual computer can take up part of an existing computer and have no knowledge of other possible virtual computers on the same machine. What’s even nicer is that you can run multiple operating systems on the same computer. There can be an instance of Linux on a Windows box or vice versa. There can even run different size processors on the same machine.
This probably seems a little techie for most people, but it’s not hard to see how you can really save money. One nice thing with computers is as the capacity of a hard drive increases, the cost per GB of memory actually decreases. There is an upper bound, but this means you can actually buy a much larger hard drive at a cheaper cost to a few smaller ones with the same capacity. This means a single server machine has enough space to hold several applications instead of a single server for each application. This is especially useful with other applications that only have a small user-base.
I currently work in a lab that is also a server room. The temperatures must be below 60 degrees in order to prevent the servers from overheating. Imagine how much your company can save by choosing virtualization. A smaller room could now be used as there are fewer servers. This could drastically increase savings on energy by simply having a smaller room to now cool. Time can also be saved because you now only have to make system updates on few machines.
While virtualization is only available free on the Linux operating system, server machines are usually better off without having Windows on them. Linux contains far less overhead that Windows making it a smarter choice for a server OS.
Next time the idea of buying new servers comes up in your office, remember computer virtualization. It could save your company tons of money and cut back on your energy usage that will help contribute to a cleaner environment.
