High Efficiency Cooling in Data Centers PUE about 1,05 – 1,10

A few weeks ago I had the chance to visit a high effiency cooling cell here in Berlin.

Together with Norman Beherzig, who wrote this blog, I want to share with you what I have learned.

If you have more questions, do not hasitate to reach out to me or Norman.

A cooling concept for modular indirect free cooling will be tested in the test data center of dc-ce in the technical University of Berlin

The cooling concept developed by dc-ce RZ-Planung, whose centerpiece is the AirBlock MIFC, allows achieving a high efficiency cooling in new and in existing buildings by optimally combining architecture and technology. This is possible in standard and in high efficiency data centers, which are consuming up to 40 kW per Rack.

The concept can be individually customized to the client needs. The AirBlock MIFC fits optimally in the spatial dimensions and it can also be delivered as Plug&Play solution. The AirBlock consist of reliable and highly available components such as an air-air heat exchanger, modern free controllable EC-Ventilators and other components, which are all exactly coordinated to avoid the pressure deficiency, and thus reducing the energy consumption. All these reasons along with the investment, energy and operation costs as well as the flexibility of the AirBlock MIFC make of it one the most efficient systems available on the market.

During the cooling of data centers most of the energy consumption comes from the mechanical production of cooling and the overcoming of pressure deficiency. Therefore, a high efficiency cooling would be one operating with the lowest pressure deficiency and having most of the time the compressor-based cooling off.

The solution is found in the most important component of the AirBlock MIFC which is a cross flow heat exchanger. It can operate longer than traditional cooling solutions in free cooling mode in temperatures from 10°C up to 12°C. This operation condition is supported by the free controllable EC-Ventilators, which by means of an intelligent control make it possible to always run the AirBlock MIFC exactly with the required air volume.


Increasing the Efficiency

The AirBlock MIFC offers a considerable efficiency increase in different areas:

 »» Full power operation in free cooling under appropriate temperatures of the data centers supply air (this value is free to be chosen by the Client) which oscillates in the range of 25°C down to 19°-22°C.

»» 85 % – 90 % free cooling per year according to the location

»» In case of having a partial load of 25% and with an outdoor temperature of around 20°C, only 1% of the IT-Load is required for supplying the cooling. This represents a very good optimization of the partial load behavior of the system.

»» In average only 5 % – 10 % of the IT-Load are required to provide cooling per year. Other modern cooling concepts achieve 20 % – 30 % in average per year while old systems have performances even over 50% of the IT-Load.

Please visit the test data center at the Technical University Berlin. Mr. Norman Beherzig is available for you to arrange your visit at the test data center  – n.beherzig@dc-ce.dewww.dc-ce.de.


Hyper-V-Community Treffen am 13. Juni in Berlin

Zitat: http://www.hyper-v-community.de/


Nun ist es endlich soweit, wir fahren nach Berlin. Am 13. Juni kommt die Hyper-V Community nun nach Berlin, unser nächstes Treffen findet diesmal im Cisco Office in Berlin statt.

Geplant sind 3 spannende Vorträge (siehe unten) und wir werden auch wieder viel Zeit für Diskussionen haben. Der Start ist wie gewohnt um 14 Uhr und das Ende liegt so gegen 19 Uhr mit Getränken und Schnittchen.

Folgende Vorträge sind geplant:

  • Integration von Compute und Netzwerk in Microsoft Server 2012 Hyper-V – von Matthias Wessendorf – Cisco Deutschland
  • Praxiserfahrungen: SystemCenter VMM 2012 SP1 Erfahrungen aus der Praxis – Udo Walberer
  • Neuigkeiten von der TechEd 2013  – von Carsten Rachfahl – Rachfahl IT-Solutions

Wir werden sicherlich wieder viel Spaß und viele Erkenntnisse an dem Tag gewinnen und wir freuen uns schon auf euer zahlreiches Erscheinen.

<<< Hier geht’s zur kostenlosen Anmeldung >>>


Aus <http://www.hyper-v-community.de/>

You want to become a Hyper-V Superstar? You need the PowerCourse!

I had the chance to participate Carsten Rachfahls Hyper-V Power Course V2 in the week from 10. December to 14. December in Hallenberg Germany.

I have to say, it was a great experience. I work with Hyper-V since 2009 and I think I know something about it but in this course you get also a extrem deep dive in all functions of Hyper-V and all dependencies.

Carsten and his CoTrainer Jan Kappen are very experienced technicians and have also a wide knowledge in consulting and support.

Both brought all this experiences in their new Hyper-V course based on Windows Server 2012 RTM.

What can you learn? At first they build up the elementary knowledge for all who never worked with Hyper-V before, after this they dive with you into Hyper-V replica, networking , Live Migration, Clustering, SMB 3.0 and all other functions.

For every feature they build a lab so that you can try it by yourself and in different use cases.

As you know I participate the Windows Server 2012 Upgrade Course in the beta Version at Microsoft (Redmond, WA, America) in August this year.

When I compare both courses to each other my resume is the following.

When you want to become a good overview about all new Windows Server 2012 features you will do right with the official MOC course but you will not get a deeper introduction in Hyper-V. When you want real big and awesome Hyper-V knowledge, you have to join the Hyper-V Course of Carsten Rachfahl and Jan Kappen.

But be aware, this Hyper-V Course week is very hard and full of stuff you need to see and learn. 


Photo of my PowerCourse certificate

To find more information please visit:

Additional information:

– free internet during the course hours
– free drinks and snacks
– free and very delicious lunch in hotels (4 stars) near by

My take aways from E2EVC

One week is over since the E2EVC ended for this year.

In my opinion it was a awesom event. Great presentations and speakers.

I had also the chance to speak with spend a lot of time with a few of my IT idols.

Didier van Hoye:

Didier shows me every day, how many things I don’t know, specially about storage and networking. 

Carsten Rachfahl:

He is also my mentor and the person, who pushes me along the Windows Server way. 

Thomas Maurer:

Thomas is one of the youngest MVP and also my personal competitor 😉 . He’s two years younger as my self and still on a professional level that I also want to reach in future. Well done Thomas and go on! 

Jeff Wouters:

Jeff also known as PowerShell Magician, is no MVP yet, but definitively on the way to become one. He is one of the best and most experienced PowerShell Gurus in EMEA. 

Aidan Finn:

Yes, last but not least Mr. Aidan Finn. One of the Microsoft MVP Rockstars EMEA and Worldwide. I felt like a teenage girl who met Justin Bieber when I talked to him or spend time with him and the other Experts. 

Aidan also signed my book. 😀 


I’m a little bit sad that Hans Vredevoort became sick, short before the event and can’t make it. 🙁

I captured some interviews at the E2EVC weekend and I will publish them step by step, as soon as possible.

All in all it was an amazing weekend I will visit E2EVC again, if I get the chance.


Next time E2EVC will take place in Copenhagen Denmark from May 31 to June 2, 2013.






E2EVC in Hamburg from 02.11.2012 to 04.11.2012 // The chance for me to meet great experts in person

Hi community,

E2EVC is a small but one of the most important virtualization events in Germany, if not even in Europe. Many well known experts will attend that event, amongst them a handful of Microsoft Most Valuable Professionals (MVP).

I will attend E2EVC, which will take place 02. – 04. November 2012 in Hamburg (Germany) and I will meet some of the MVPs in person and interview them. You will find these interviews in this sequential order at the DELL TechCenter after the event.

In case you are not familiar with E2EVC Virtualisation Conference, the Microsoft Most Valuable Professional program or both, please find some key facts below.


So first, what is E2EVC?

E2EVC Virtualisation Conference is a non-commercial,virtualization community Event.
Our main goal is to bring the best virtualization experts together to exchange knowledge and to establish new connections. E2EVC is a weekend crammed with presentations, Master Classes and discussions delivered by both virtualization vendors product teams and independent experts.
Started in 2003 with just 4 people and after 16 successful events grown to a well-recognized event with over 120 attendees. Our conference has taken place in cities such as Munich, London, Amsterdam, Brussels, Berlin, Frankfurt, Dublin, Paris, Munich, Nice, Lisbon and Vienna. The next conference will take place in Hamburg, Germany.

Source: www.e2evc.de


Which MVPs will I meet in Hamburg?

Carsten Rachfahl, Didier van Hoye, Thomas Maurer, Aidan Finn and Hans Vredevoort confirmed they will give me an opportunity to interview them during the event. All of them are well known Microsoft MVPs and great guys.


Who is a Microsoft Most Valuable Professional (MVP)?

According to MicrosoftMicrosoft Most Valuable Professional (MVP) award is given to “exceptional, independent community leaders who share their passion, technical expertise, and real-world knowledge of Microsoft products with others.” The awarded are people who “actively share their … technical expertise with the different technology communities related directly or indirectly to Microsoft”. An MVP is awarded for contributions over the previous year.

The MVP program grew out of the software developer community, as the initial MVPs were some of the most active on the online peer support communities such as Usenet and CompuServe. It has since grown to include other types of products, and other avenues of contribution. Steve Ballmer spoke to a group of Microsoft MVP’s about XP and Vista.

Source: http://en.wikipedia.org/wiki/Microsoft_Most_Valuable_Professional


So, whom am I going to interview? 

Let me introduce them to.you one by one:

Carsten Rachfahl

Consultant and Architect, Rachfahl IT-Solutions
Carsten Rachfahl started his IT career in 1988, working as a developer on porting X-Windows to an OS called OS/9. In 1991, he founded his own company in Germany and is self-employed since these ancient days. Starting 2001 with Citrix/Terminalserver, his focus is on the virtualization space till nowadays. When Microsoft finally created a “real” Hypervisor and brought that to the market, he was all in. His Blog www.hyper-v-server.de is highly recognized and appreciated within the virtualization community. The Blog features tutorials, articles, screencasts, video interviews and podcasts focusing on the Microsoft Private Cloud. Being MCT, he teaches various Microsoft virtualization-, and his own “Hyper-V Powerkurs” course. As co-founder of the German Hyper-V Community he regularly organizes events and he has received the Microsoft Most Valuable Professional (MVP) award for Virtual Machine in the year 2011 and 2012.

Twitter: https://twitter.com/hypervserver                                                                           
Blog: http://www.hyper-v-server.de/                                                                               
LinkedIn: http://de.linkedin.com/pub/carsten-rachfahl/22/178/598                                 
Company: Rachfahl IT Solutions


Didier van Hoye

Didier Van Hoye has been earning a living in IT since 1996. Currently he’s the Microsoft Infrastructure Architect at the Flemish Geographical Information Agency. In his day job he’s involved with Windows Infrastructures amongst which Exchange Servers, SQL Servers & the System Center Suite. Didier uses Hyper-V, failover clustering, NLB, and Storage Area Networks in creative attempts to give his demanding user base both good & cost effective solutions to sometimes very challenging needs.

Twitter: https://twitter.com/WorkingHardInIT 
Blog: http://workinghardinit.wordpress.com/ 
LinkedIn: http://www.linkedin.com/in/didiervanhoye   
Company: Flemish Geographical Information Agency


Thomas Maurer

Microsoft MVP for Virtual Machine. Work as a Private Cloud Architect for itnetx gmbh, a consulting and engineering company located in Bern/Switzerland. We are focussed on Microsoft Technologies, especially Microsoft Private Cloud Solutions, Microsoft System Center and Microsoft Virtualization.

Twitter: https://twitter.com/ThomasMaurer
Blog: http://www.thomasmaurer.ch/
LinkedIn: http://ch.linkedin.com/in/thomasmaurer2
Company: itnetx gmbh

Aidan Finn

Aidan Finn is the Infrastructure Team Lead with System Dynamics, a consulting services company located in Dublin that provides IT infrastructure and business intelligence expertise. He has been working in IT since 1996 and has specialised in working with Microsoft infrastructure solutions including Server, desktop, System Center and virtualisation. Aidan is an MCSE and a Microsoft MVP in Virtualization. Aidan co-wrote Mastering Windows Server 2008 R2 (Sybex), is the lead author of Mastering Hyper-V Deployment (Sybex), and is contributing to Mastering Windows 7 Deployment (Sybex).

Twitter: https://twitter.com/joe_elway
Blog: http://www.aidanfinn.com/
LinkedIn: http://ie.linkedin.com/in/aidanfinn
Company: Micro Warehouse

Hans Vredevoort

Hans Vredevoort is Consultant, Inovativ in the Netherlands, Microsoft MVP (Hyper-V), Microsoft vTSP Datacenter Solutions. He has a been an MVP (Cluster, Hyper-V) since 2009 and has a strong focus on Private Clouds built on top of Hyper-V and Microsoft System Center. He helped to kick-start the Hyper-V community and blogs/presents for www.hyper-v.nu as well as on numerous other occasions. Hans wrote the fabric chapters of Microsoft Private Cloud Computing, was the technical editor for Aidan Finn’s book Mastering Hyper-V Deployment and is now editing a new book project centering on Hyper-V in Windows Server 2012. After a long career with a system integrator in the Netherlands, he joined the System Center focused company Inovativ last year, where he is one of eight MVP’s that are working for this company. Vredevoort has assisted countless companies with architecting and building high available ‘cloud’ infrastructures using Windows virtualization, blade servers and shared storage.

Twitter: https://twitter.com/hvredevoort
Blog: http://www.hyper-v.nu/
LinkedIn: http://nl.linkedin.com/in/vredevoort
Company: inovativ

Alex Juschin

Microsoft Most Valued Professional for Virtualization for six years 2006, 2007, 2009, 2010, 2011, 2012. Also, as recognition by Citrix Inc. He received the Citrix Technology Professional in 2006, 2007, 2008, 2009, 2010, 2011, 2012. There are only abour 40 people holding any of it in the World. It is an big pleasure and responsibility for me to be listed as MVP and CTP, among the best people in the Industry.
He have organized and led all the PubForum/E2EVC events since the very first one in Amsterdam in August 2003. His current strong points are Microsoft Server Products including Windows Server 2008 (R2), 2003, MOM, Active Directory, Server Virtualization via VmWare,Hyper-V, XenServer, Server Management, Infrastructure planning and optimisation, implementation of Microsoft Best Practicies, Remote Desktop Services and of course Citrix. He started to work with Citrix Products in 1998, before he was very much into the Novell, Windows NT and Security world.

Twitter: https://twitter.com/E2EVC
LinkedIn: Alex Juschin
Company: E2EVC

Sources: MVPs’ websites


Make sure you don’t miss the interviews

I will start posting my interviews with the Microsoft Most Valuable Professionals (MVP) right after the conference. If you don’t want to miss any of them, pull the RSS Feed for posts.

If you have any questions either to me or to one of the MVPs I am going to interview, feel free to shoot me a line. Looking forward to hear from you!