Data Center Pulse Blogs


Making A Change

It was a little less than a year and a half ago when I made the announcement that I was moving to ServiceMesh, now I've made another change. What the heck, do I have ADD? Well, I do have ADD, but that's not why I've made a move to a new company.

I joined ServiceMesh because I believed in their vision for cloud management and I still do. During my time there I was able to delve deeply into the world of cloud in general, and specifically as it applied to large enterprises. ServiceMesh was on to something when I joined, and that's not changed. They still have an amazing story in the cloud management space and it's only improving.

So How Did This Change Come About?

As part of my role at ServiceMesh I would occasionally work with partners, helping to develop an adoption strategy. Over the last few months I've been leading a project to do just that at Switch . It was during this project that it became obvious that my data center background, combined with cloud experience was the perfect fit to help Switch achieve its goals. So, while I have moved from ServiceMesh to Switch, it was more like an "employee" transfer than a resignation. At Switch I will have several responsibilities related to Data Center Tech, in combination with ensuring that the solution vision shared by ServiceMesh and Switch is realized. So, in effect, I'm working for both companies now.

Needless to say, I'm extremely excited about my new role. I'm back closer to the data center again, and I still get to play seriously in the cloud. The move to Switch was made easier by the fact that I believe they have the best data center solution on the market. So, as a data center guy, how could I resist.

If you find yourself in Vegas and would like to chat, be sure to look me up.

 

Are You a Server Hugger? - Ownership Disease, How it Can Hurt You in IT?

 

Ownership has several important connotations and I use it to define my take on personal responsibility for pretty much every aspect of my life.  However, it can also mean a "systems" approach to "owning" all aspects of a specific service, solution or function (I.e., I own the Data Center top to bottom).  While both of the previous "ownership" definitions are positive, there is a "darker" aspect of owning (hugging) "things" in IT. 

The audible symptoms of being Positive for Ownership Disease

I've been in IT for over 20 years now and I've seen all the symptoms as we move from one service strategy to another or make an effort to transform the technical architecture of a component of the infrastructure. Maybe some of you will recognize the following paraphrased quotes that are examples of the symptoms of ownership disease;

"We can't move to client server, there's no way it will ever be as rock solid as big iron"

"No, Mr. CFO, we shouldn't move to VoIP, it's not ready for production. Our current switch has been running without interruption for years, why take the risk?"

"Virtualization isn't production yet, when you really want to ensure performance you have to stay on hardware"

"If you want storage performance and dependability it has to be SAN, and it has to be from (three letter acronym here)"

"We can't use outside air for the data center. It's too dirty and it will increase the failure rate of our hardware"

In it's current form the disease is most often identified through the following phrase:

"We shouldn't adopt cloud, it's not secure"

The reality is that in any one of the above quotes there is just enough truth to scare the unaware executive into staying the course. What is generally not explained is lost opportunity vs. a realistic risk value. I'm sure most of us can quickly look at these examples and see the issues (I.e., how important was 100% uptime on the legacy phone switch vs. saving $2 million a year by going with a VoIP solution or even outsourcing it?).  In reality if the CEO/CFO understood the real risk value vs. the savings or business benefit, they would likely have said make the change.

You can call the above quotes myths, FUD, or lies, but in most cases it really boils down to "ownership" and the fear that not being the owner of something (that I know better than anyone else) will put my job at risk. The truly unfortunate aspect of this fear of job loss or at a minimum status reduction, is often generated or perpetuated (mostly inadvertently) by leadership.  

The visible effects of being Ownership Disease Positive

There a number of places you can look to find the visible symptoms of the disease, but the most obvious is the delayed adoption of solutions that can bring real change to your business and consequently to your IT team. While it's true that technology should never be adopted for the sake of "technology", it's also true that real opportunity for improvements in cost, management agility, and business execution can be lost when the disease strikes. Let's look at a couple current examples:

Virtualization - As a commonly utilized building block for efficient IT, and improved execution, virtualization is also the most often used tool for on-ramping to the cloud. Companies that failed to make real investment in a strategy for virtualizing their environments now find themselves behind the curve in the adoption of cloud computing.

Data Centers - Being the beating heart of the IT organization, it's strange that the data center is often overlooked as nothing more than an expensive room that we occasionally have to throw lots of money at. Lack of adoption of things like virtualization or outside air will now mean that you're stuck with a beast that is at max capacity with only one quarter of the actual space utilized. You're also stuck with an inflexible design that won't allow you to quickly take advantage of new business opportunity or to just as quickly scale back to avoid wasting cash during a difficult business climate.

Why am I Blaming The Leadership?

Who do you blame when your favorite team doesn't win the championship? You might blame the team owner, or maybe there's one player you really dislike, but in most cases it falls on the coach. So, if your IT team isn't dealing effectively with ownership disease, you have to look to leadership first. What can we do to reduce the risk? This is the tricky part, I know I don't have all the answers, but the following are a few of my recommended strategies to help protect your team from becoming infected.

Recognition and Job Comfort (or freedom from fear)

I'm a huge believer in appropriate recognition:

Example Role: In a high impact support function with lots of customer interaction, getting regular positive feedback (daily) is critical. I'm also a believer that you find the job for the person. If you find yourself perpetually having to explain customer service principles to the same person, you need to find what they are good at. If you spend too much time trying to change negative behavior, instead of reinforcing positive behavior you end up with nothing.  Why expend 80% of your energy to get a 20% solution when if you focus on natural abilities the good stuff practically happens by accident and even weirder is the employee likes their job.

When recognizing someone be sure that the message you convey is the right one. If you find yourself saying "Gosh George, without you knowing the phone switch so well, I don't know what we'd do" then you're reinforcing the wrong things.

Recognize your teams for working themselves out of a job. One of my favorite leaders used to tell me all the time "if you work yourself out of a job, I'll find you a better one" and he meant it. This particular form of recognition is the riskiest for the manager, because if you don't plan to follow through (yes that means you have to actually work at future proofing your team) you will immediately lose the trust of your folks.

Be sure to recognize individuals in the manner that they not you are most comfortable with. Yes, I know its novel, but everyone is different.

You must recognize taking "smart" risk as a positive behavior. Talking about it once a quarter isn't enough, it has to be visible and real (promotions, new job options, mentions, etc).

If you do the above and maintain regular communication (not just monthly 1:1s) with your staff, you're likely to build a strong team who is willing to speak out about waste and inefficiency, even if they're talking about their own function. The hard part is that you'll know you're successful when your team tells you when you've screwed up. When your team no longer believes that their future is tied to knowing a specific vendor technology, or architectural strategy then the natural fear we all have of change will be dramatically reduced.

Now go out there and vaccinate your team. Or if you recognize some weakness in your leader(s), then point them to this blog. You'll know your disease free when you're the first one to say "we should consider reviewing alternatives" with full understanding that the alternatives could affect your role.

 

Facebook’s New Data Center – What can we learn from it?

 

When I read about a data center like the new Facebook facility in Princeville Oregon being commissioned and learn of all the innovations I'm heartened at the headway our industry is making, but I'm also forced to think of an analogy. The Facebook facility is very much like the NASA space program, there's lots of great tech created, but it takes a while before Tang is in everyone's fridge. Ewe, I can still remember the taste of that orange colored vile brew.

This blog is in no way a negative on what Facebook has done, quite the contrary. This new facility is an excellent example of how real innovation can occur when you break down the assumptions that most of us operate under. Things like high temp or outside air being a problem, assuming what our vendors told us is "all there is" is true, etc., etc..

I led a team that built a very efficient facility for VMware in Wenatchee Washington two years ago. Many of the basic characteristics of the Facebook facility (not their IT equipment) mirror what we did in Wenatchee. We used outside air, we conserved water through a grey water system, we heated the offices with hot air from the servers and didn't use ducting. We also had hot air containment, no raised floor, and a modular design for build out of the larger pods and the smaller containment units.  I'm no longer at VMware, so I don't know what the PUE is, but during commissioning and first use, we were seeing 1.25 or less as the expected efficiency. However, the point is that Facebook has taken several known opportunities and improved on them and they've pushed the boundaries on equipment design with their partners and suppliers.  

Why won't the Facebook design apply to everyone?

The Facebook design won't apply to everyone, just like it probably doesn't apply for some of Facebook's own IT application environments. The variety of hardware and legacy application and physical architectures in most large IT shops mean that it's a non starter to consider building something that is one size fits all. That being said, it doesn't mean there aren't one size fits all environments, they just aren't designed to the same efficiency ratings being claimed by Facebook.  Also, besides the fact that Facebook can buy large numbers (1000s at a time) of servers with every order, they can also buy the same kind of server. The goal of homogeneity is still extremely elusive to enterprise IT environments.

What are the positive learning's to take away from the Facebook solution?

  • Higher temp in the data center is OK. If you're still running your facility at the standard 68-72 degrees F, you're wasting a bunch of energy.
  • Using outside air is being proved out yet again. After some early adopters began using it as early as 5-6 years ago, we're finally starting to accept it as a fact.
  • You can and should push back on your suppliers to give you gear that does the job without being wasteful.
    • Reduce packaging
    • Eliminate unnecessary additions to servers that don't add to functionality, efficiency or availability
  • Demand higher efficiency power supplies
  • Look for modularity in virtually everything you implement
    • Server design
    • Data Center building design
    • Power distribution
    • UPS capacity
    • Network design
    • Etc.

When you push your suppliers you'll be surprised what you can get. But remember, you have to know what you need and why you need it or others will define what you need for you.

Most of us know what to do, and we just have to decide to do it.  Just remember that even the coolest sounding efficiency benefit can sometimes cost more to implement than you'll get in reduced energy or management costs, so do your homework.

I'd like to close by saying that this Facebook data center generally supports the message in several of my previous blogs (Manufactured Data Center and Cookie Cutter Data Center ). As data center builders, many of us hold on to our creations like they are our personal Frankenstein, it is time to let go. The complexity of building, owning and operating your own facility effectively is just too much risk and overhead for the average IT organization and for the enterprise itself.

 

Paul Sun Director of Cloud Computing for ITRI Taiwan Joins the Data Center Pulse Board of Directors

Paul Sun Director of Cloud Computing for ITRI Taiwan Joins the Data Center Pulse Board of Directors
Data Center Pulse expands the board of directors to continue the goal of influencing the datacenter industry through their exclusive, global end user community.

UNION CITY, CA, February 8th, 2011 - Today, Data Center Pulse added Paul Sun to the Board of Directors as the Asia Pacific Regional Director 

Paul Sun is the Director of the Cloud Computing Center for Mobile Applications at ITRI (Industrial Technology Research Institute), www.itri.org.tw. ITRI is a national research organization that serves to strengthen the technological competitiveness of Taiwan. ITRI's 6,000 employees conduct advanced research and development in Communication and Optoelectronics, Precision Machinery and MEMS, Materials and Chemical Engineering, Biomedical Technology, Sustainable Development, and Nanotechnology.

Mr. Sun is responsible for cloud computing hardware and system infrastructure research and development at ITRI
Paul recently articulated his motivation for accepting the DCP board position. "The Data Center Pulse Board of Directors is made up of an outstanding team of veterans and experts from the data center industry. It is an honor for me to join and help to make DCP into a leading, international organization. Asia is experiencing tremendous growth in the data center industry. My main goal is to focus on the APAC countries, help to foster the exchange of ideas and needs in Asia as the DCP representative."

The Data Center Pulse core membership has reached 1,850 people in 62 countries representing almost 100 different industries. The interest level is increasing and the timing is right to focus more energy on our membership in the Asia Pacific region. With Paul in place, DCP will have a representative in a position to help gather information on local issues, while also representing DCP to new potential members.

Data Center Pulse has the ability to reach a significant population of Data Center customers ranging from a single rack to some of the largest Data Centers in the world. DCP continues to search for candidates to fill the remaining board positions as well as participation in the Industry Alignment Board (IAB) and the Technical Advisory Board (TAB). To become a Data Center Pulse Member, click here. For more information on DCP or local chapter interest, please email info@datacenterpulse.org.


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About Data Center Pulse: Data Center Pulse (DCP) is a growing, non-profit, datacenter industry community founded on the principles of sharing best practices amongst its exclusive membership.  Founded in late 2008, DCP is quickly becoming an industry nexus for the explosive datacenter industry's operators and influencers.  DCP's mission is to align end users to share information thereby influencing the industry by defining, adopting and driving best practices and next generation solutions. The DCP members are the individuals that evaluate, recommend and purchase the products and services for the datacenter. They represent billions of dollars of annual purchases that drive the IT economy. Information is available at datacenterpulse.org.

Modularity Design Summit Readout!

 

On February 22, 2011 - Data Center Pulse will be holding a modularity design summit readout at the Google campus in Mountain View, CA.

 

This full day event is in response to our membership request to have visibility into the results of the Modular Data Center RFP process that was held in late 2010. We received many emails and calls asking if they could be a fly on the wall for the presentations. While we could not grant that access during the review process, we decided to take another approach. The finalists and the winner in the RFP have agreed to give individual presentations on their design approach to DCP core members. We were very pleased with the creativity and extra effort that these companies put into their designs. We also believe that there is no single answer to any problem and that sharing these designs with our membership will bring great value to both sides. Data Center Pulse is laser focused on continuing to influence the Data Center industry to provide more innovative and efficient solutions the challenges end users face daily. The Modular Data Center RFP process embodied that intention.

 

This exclusive summit is limited to the first 85 Data Center Pulse members who register. You must be a current Data Center Pulse member to qualify to attend. Please ensure you are an active member through the DCP LinkedIN group.

 

Registration information will be provided later this week in this DCP group discussion thread. (LinkedIN login required).

 

For more information on the modular RFP process, please see the following

 

Participate in The Green Grid's Economizer Survey

As part of our partnership with The Green Grid, Data Center Pulse is assisting The Green Grid's Thermal Sub-work group by asking our DCP members to participate in the following survey regarding Economizers:


http://www.zoomerang.com/Survey/WEB22BR53UP3GP/


Please click on the link or paste it into your browser and participate. The survey is open until Feb 5th 2011.

Turn Up The Heat!

Project Mercury is born...

Project Mercury

 

Today, we are pleased to announce that EDI, along with their partners AHA Consulting Engineers and Winterstreet Architects, have been selected as the winner of the Modular Data Center RFP - now dubbed as Project Mercury.

This has been an extremely interesting process for us with an unexpected result. EDI, a small company that we had never even heard of before, was able to meet all of the challenging requirements we had proposed to the industry through the Modular RFP process in a cost effective, simple design. In addition, a very compelling ultra dense product named "eHive" emerged from Skanska, one of the RFP finalists. It has not been released publicly yet (stay tuned for follow up). While Skanska was not selected for the RFP, their modular product was innovative enough to warrant further consideration in this data center deployment. All in all, the open RFP process did exactly what we had hoped. It enabled design engineers the opportunity to shed the traditional barriers, consider the difficult challenges and start with a clean slate. The outcome was new and compelling solutions as well as new innovative products driven by the free cooling, density and flexibility requirements.

In the video below we go into more details about the process, the team and the challenge that still lies ahead. We made the decision to engage with EDI and explore the Skanska product in mid November. From that point the team has been working non-stop to make up the time we lost during the RFP process. While the selection process took almost two months longer than anticipated, the end date did not change. We are still laser focused on completing the Data Center by summer 2011.

In the design sessions that started in mid-November there has been lively discussions and debate where phrases such as "Hot Water Cooling","Extreme Density""Rapid Deployment", "Multi-Tier", and "Rack & Roll" were common. Day one, I sat down with the team and tasked them to solve the challenge holistically, not just from a Data Center availability perspective. I detailed the IT equipment that will be going into the Data Cener and how it must be fully integrated with the facility. it is all about density, rapid deployment and sustained efficiency even under varying work load. This balance is where extreme efficiency can emerge. Data Center Facilities and IT equipment are not mutually exclusive, they should work in harmony.

Keep an eye on the Modular Page and our YouTube channel for updates as we build project Mercury!  It's getting hot in here!

Contact: modular@datacenterpulse.org

 

 


Is Private Cloud Real or Just a Fantasy?

The argument on whether there is such a thing as "private cloud" just won't go away. Many of the big name SaaS and Public cloud players continue to publish content that poo-poo's the reality of Private Cloud.  I'm writing to suggest that the arguments against private cloud are in many cases wrong, and in some cases pure sales FUD (Fear Uncertainty & Doubt). However, before I go into my little diatribe, I want to make clear that just because I'm a private cloud believer, it doesn't mean I don't believe in "public cloud".


Some of the more common arguments on the viability of private cloud revolve around some common themes that IT has been sold by vendors for years:



  • - "make better use of your internal staff by having them work on things that drive business differentiation"

  • - "private cloud doesn't have infinite scale"

  • - "the security of public cloud/SaaS providers is better than anything a private cloud could create"

  • - "staffing for running private cloud environments will be difficult" (I thought they said there wasn't a "private cloud")

  • - "public cloud offers economies of scale that can't be met by a single enterprise"

So, let's take each one of the points above and attempt to break through the FUD.


"make better use of your internal staff by having them work on things that drive business differentiation"


Who can argue with that statement? I certainly can't because I believe we all should be trying to do that. However, as IT leaders we've been told that by our vendor partners for decades and yet IT as we know it still exists. Why does IT still exist, because inherently most companies understand the "innovation & creativity" benefit of having their own IT team.  While empirically I hope for the day when most IT jobs are higher level business interaction level positions, I also understand that that day is many years away, cloud or no cloud.


"private cloud doesn't have infinite scale"


True, but SO WHAT? How often does your business need infinite scale? I've done cost comparisons of well designed private cloud implementations for large enterprise and found them to be very competitive with public cloud. In fact, they were so competitive that having a little extra capacity and having a contract for "burst" capacity was OK. If I knew that I needed 2X or more extra capacity even two or three days a month, then I would consider my options for putting that specific environment in a public cloud. The alternative is to have contracted burst capacity available.


"the security of public cloud/SaaS providers is better than anything a private cloud could create"


Generally speaking this statement might be correct. There are certain industry verticals that could argue differently (Financials), but it's probably true for many. However, does that really change the equation? The difference with internal vs. external security might be minimal compared to an unforeseen legal issue that results from public cloud dependence. In each case the business needs to make a conscious decision on the importance of their IP. If security isn't important to the business when it's internal then it still won't be important in the cloud. Now consider the fact that the worst security threats come from the inside and you can understand why just moving it to the cloud doesn't solve anything. In fact it's very much like outsourcing something that's broken. In most cases all you've really done it make the problem more intractable and created a no-win situation with your vendor.


"staffing for running private cloud environments will be difficult"


So my first comment is; if there's no such thing as private cloud, how difficult could it be to staff for it? However, all kidding aside IT organizations the world over have been building and managing complex infrastructure for years. Arguably a well designed private cloud implementation actually improves usability and simplifies the roles of many IT folks because it can bring automation to otherwise high risk manual tasks.


"public cloud offers economies of scale that can't be met by a single enterprise"


Next to the "infinite scale" point that's always used by public cloud providers, this is the next most common refrain. Unfortunately, it's not necessarily the case. In a previous comment you can build private cloud environments that offer significant scale and provide all the necessary environment, security and staffing requirements at or below the cost of public cloud offerings.  I'm not saying it's easy, and in each business use case the drivers and costs will be different, but it can be done. I'm not arguing in favor of private cloud for cost savings, for me it's more about options and the potential to bring new innovation to the business. If for whatever reason I can't utilize public cloud for any or all of my workloads, at least I can get the majority of cloud benefits by having a private cloud.


So, just say yes to private cloud if it's what the business needs, but like any IT solution don't implement it without a clear set of objectives. Do your due diligence and ensure you're bringing the right tool to generate the right business opportunities, whether that tool is a private, public, hybrid cloud, or none of the above.


In closing, I'm not trying to argue against public cloud, but rather to argue that the reality and benefits of both private and public cloud are real.


Long Live Cloud!

The POD Father

I love meeting people that has much passion and drive for technology as I do. Wade Vinson, a Power & Cooling Strategist at HP, is one of those guys. He is better known as the POD father (and yes he gets a lot of guff for that name!). He ranks pretty high on my geekism scale due to his utter exuberance for his lego-set data center. I recently visited the HP site in Houston Texas to look at the latest HP POD. Wade was nice enough to let film a tour with him for our latest Data Center Pulse "On-The-Road" episode. He also tried very hard to convince me he could join DCP Core since he is an "End User" after building his 6MW POD test facility...hmmm...

The jury is still out on standard "containers", but Wade has evolved their approach and come up with a new building block. It's no longer a shipping container, it's a POD (sounds familiar). The POD is wider and taller than a container with everything you need packed inside. Ahh, glorius density! That is music to my ears. Now if it only had a high-temp, liquid cooled IT equipment option with over-clocking (that sounds like a familiar request as well). :-)

Episode 3 of DCP "On The Road" is embedded below. Stay tuned for more episodes on the DCP YouTube Channel. http://www.youtube.com/user/datacenterpulse

 

The Manufactured Assembly Line Data Center

Why is an individual computer server different from a data center, other than scale? After all, the physical characteristics of a server are very similar to those of a data center.  

Let's Compare the Characteristics of a Server to those of a Data Center
Server Housing (case) = Data Center Building
Case Open Alarm = Data Center Entrance Security & Environment Management Alarms
Fans = Air Conditioning
Power Supplies = Power Supply (transformers, UPS, distribution, PDUs)
Alerts/Alarming = Data Center Monitoring and Alerting
Administrator = Data Center Staff/Manager

Why is the above comparison of a server and a data center important?
"We need to move away from building custom data centers". There I said it, man that hurt. As a data center guy, I can't stand the idea that there will soon be a time when building a unique facility for my company will most likely be the wrong thing to do.  Before you start throwing things at your computer screen and yelling my name in anger, consider the following historical examples of the automobile and the personal computer:

The automobile - Prior to the invention of the assembly line by Ransom Olds cars were handmade and individually assembled. 

A Little Assembly Line History:
In order to keep up with the increasing demand for those newfangled contraptions, horseless carriages, Ransom E. Olds created the assembly line in 1901. The new approach to putting together automobiles enabled him to more than quadruple his factory's output, from 425 cars in 1901 to 2,500 in 1902
Olds should have become known as "The father of automotive assembly line,"  although many people think that it was Henry Ford who invented the assembly line. What Ford did do was to improve upon Olds's idea by installing conveyor belts. That cut the time of manufacturing a Model T from a day and a half to a mere ninety minutes. Henry Ford should been called "The father of automotive mass production." 

One could also argue that since the advent of the assembly line and mass production, there continue to be innovations that reduce the complexity and "individual" nature of many automotive components. Most automobile manufacturers don't build their own windshields or individual parts anymore. Instead they are mass produced by others who can apply standards across multiple car lines.  You can still buy a handmade car, but you definitely pay the price.

Personal Computers (PCs) - Prior to 1982 many of us bought components and made our own PCs.  Who would build their own server or PC today? Maybe high end gamers or organizations looking to solve a very unique problem whose solution is more important than the cost. Generally speaking, building your own computer today would be much riskier, and costlier than buying one pre-built. 

Increased attention and new money will accelerate the push to a standard build data center model.  
Historically speaking most of us in the data center space understand that there's still room for unique design as we push the limits towards the best, most efficient and flexible data center. However, the data center has gained so much visibility over the last five years that it is no longer the black box that it used to be. This public awareness has dramatically increased investment dollars in the data center industry and created a large number of data center experts.  The investment and influx of experts mean that change and improvements happen at a much faster pace than in the past. 

If manufacturing automation and standards can be applied to cars and PCs why shouldn't they be applied to Data Centers?
So, I guess what I'm saying is that the data center is ripe for the picking, just like the manufacture of PCs was in the early 80s. As we get to the point of diminishing returns relative to the efficiency and modularity of data centers, companies that continue to try and build their own will be at a distinct disadvantage. We all know that time is one of the most costly of our resources. If you can implement new capacity in a matter of weeks vs. a matter of years, you're better positioning your enterprise to leverage their IT investments to meet changing business demands.  You may believe that you could build a data center that's better than pre-fab modular boxes, and you could be right. However, just like in the case of the PC you'll likely discover that your risk and months of lost hours don't justify the small expected improvement in efficiency.

Who is going to win in the modular data center space?
What am I a psychic? I don't have a clue, but the writing is on the wall, first it was inflexible containers and infrastructure that wasn't ready. Now the containers have improved and we've got pre-fab modular designs available and IT infrastructure is quickly catching up. The key driver towards moving to a low cost standard "capacity of compute" model for your DC space will be when the majority of our applications and infrastructure can be distributed and portable through a combination of cloud technologies.

Hold on tight it's going to be a fun and probably rocky ride, but in the end businesses should win and that's what's important.  Who would you name as the Ransom Olds or Henry Ford of the Data Center?

This link is to a related blog I wrote a little over a year ago:
http://www.infra20.com/post.cfm/what-is-a-smart-data-center-and-how-does-it-relate-to-the-cloud