Interview Series: Rutger Vossebeld

Meet our next participant in the Cloudfix Interview Series! Enjoy the read, feedback is always welcome!!


rutgervossebeld

Full Name:Rutger Vossebeld
Company:Sioux-CCM
Twitter:@rutgervossebeld
LinkedIn:https://www.linkedin.com/in/rutgervossebeld

 

 


Questions

Who is Rutger Vossebeld?

I have started my IT career in 1995 configuring and building Novell 2.x, 3.x and 4.x networks, for a company in Boxtel with customers in the Netherlands, Belgium and Germany. After 2 years I decided to switch jobs and started at Sioux-CCM in Nuenen with a project to migrate the Novel 3.12 servers to a Windows NT4 environment.

Between 1997 and 2015 I have implemented several Microsoft server applications, VMware, Citrix, Juniper and Checkpoint solutions in our network infrastructure. In addition to server side applications I manage a PDM application Team center that maintains CAD data for the Siemens NX application which is used in at Sioux-CCM.


Can you tell us something about your employer/company?

CCM is a company founded in 1969 by Professor Alexandre Horowitz, and specialized in developing high tech mechatronic products and production systems for our customers. We are facilitated to complete an entire project, including design, realization and integration. This is done with about 100 employees in a village called Nuenen nearby Eindhoven.

CCM is since 2014 part of the Sioux Group.

Can you describe your IT infrastructure in short?

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Top vBlog & VMworld session voting

It is that time of the year again! The annual top vBlog 2016 voting is open to show your appreciation for all the virtualization bloggers out there. I hope we at Cloudfix have created enough useful and diverse content in order to earn your vote. We sure love what we do, and we will strive to have another successful year of writing interesting blogs.

So click here to start your voting survey which will only takes a few moments. A big shout-out goes out to vSphere-land.com / Eric Siebert and sponsor VMturbo for making it all happen!

If you are willing to vote for us, we are listed in the main voting on the left side (blogs are listed in alphabetical order) and in the independent blogger section.

votevblog2016


In other news, the content catalog for the upcoming VMworld 2016 in Las Vegas is live! Make sure to check it out here! While doing so, it is also possible to cast your vote for your favorite sessions.

Our session (I will be speaking alongside Frank Denneman) is included in the catalog:

votesession2016

 

Thank you in advance for considering us!!

 

 

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Jumbo frames and the risks involved

Even though the jumbo frame and the possible gain and risk trade-offs discussion is not new, we found ourselves discussing it yet again. Because we had different opinions, it seems like a good idea to elaborate on this topic.

Let’s have a quick recap on what jumbo frames actually are. Your default MTU (Maximum Transmission Unit) for a ethernet frame is 1500. A MTU of 9000 is referred to as a jumbo frame.

Jumbo frames or 9000-byte payload frames have the potential to reduce overheads and CPU cycles.

Typically, jumbo frames are considered for IP storage networks or vMotion networks. A lot of performance benchmarking is already described on the web. It is funny to see a variety of opinions whether to adopt jumbo frames or not. Check this blogpost and this blogpost on jumbo frames performance compared to a standard MTU size. The discussion if ‘jumbo frames provide a significant performance advantage’ is still up in the air.

There are other techniques to improve network throughput and lower CPU utilization next to jumbo frames. A modern NIC will support the Large Segment Offload (LSO) and Large Receive Offload (LRO) offloading mechanisms. Note: LSO is also referenced as TSO (TCP Segmentation Offload). Both are configurable. LSO/TSO is enabled by default if the used NIC hardware supports it. LRO is enabled by default when using VMXNET virtual machine adapters.

Risks?

Let’s put the performance aspects aside, and let us look into the possible risks involved when implementing jumbo frames. The thing is, in order to be effective, jumbo frames must be enabled end to end in the network path. The main risk when adopting jumbo frames, is that if one component in the network path is not properly configured for jumbo frames, a MTU mismatch occurs.
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Interview Series: Mark Brookfield

Meet our next participant in the Cloudfix Interview Series! Enjoy the read, feedback is always welcome!!


 

markbrookfield

Full Name:Mark Brookfield
Company:NIU
Certifications:VCAP5-DCA, VCAP5-DCD, VCP4/5/6-DCV, VCP5/6-DT(M), MCITP, MCTS, MCSE w/Security/Messsaging, CCNA, ITIL
Blog:www.virtualhobbit.com
Twitter:@virtualhobbit
LinkedIn:https://uk.linkedin.com/in/markbrookfield

 

 


Questions

Who is Mark Brookfield?

I’m an IT architect who’s been in IT for eighteen years. I’ve lived in the UK, the US, and currently I live in The Netherlands.

I don’t see what I do as “work” or “my job” – it’s something I do that people are kind enough to pay me for. I’m almost tempted to say I’d do my job for free, but I don’t want to give my boss any ideas…

Can you tell us something about your employer/company?

My current role is Technical Evangelist for NIU, a managed services provider in the UK. I report directly to the CTO and am tasked with finding new and innovative ways in which technology can make the business more successful. Fortunately, I’m not “hands-on” operational anymore, so I don’t break as much stuff 😉

NIU designs and builds solutions for a wide-range of clients, ranging from financial services to retail. We have approximately two hundred employees and our headquarters is in central London.

 

Can you describe your IT infrastructure in short?

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