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I thought I had done the best I could with optimizing our small server room. We have two rows of server cabinets which hold all of our servers, file systems and management devices. I arranged the cabinets so that both rows had the servers facing toward the aisle between them. My reasoning was that it would be easier for administrators to walk a single aisle to see systems and gain access to the KVM devices. Little did I know back then that this would lead to optimizing the space by creating a cold aisle since all the servers take in air from the front and exhaust out the back.
Well, we’ve all learned about carbon footprints, green thinking and cost reduction recently. I was talking about this with Bob Gibble, a friend of mine who stopped by a few weeks ago at my office. He builds and designs large data centers and we were chewing the fat about how much A/C I am using in my server room and my ability to expand services is becoming limited. He agreed to take a walk-through and give me some ideas.
He checked my UPS and looked at the load. Using those numbers, he calculated the amount of A/C that should be required. His rough numbers showed that the room should be demanding about 9 tons of A/C. However, I was using 20 tons and it was running 7×24 at full capacity.
So, this is the first in a series or articles about my experiences in decreasing costs, optimizing for expansion and minimizing our carbon footprint. [read more…]
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