Virtualization - Part 3: Solving the Computer Lab Conundrum

In the two previous articles we explored the concept of Shared Resource Computing, termed virtualization, and described a few ways to deploy virtual machines in your school. Let’s get a little more practical and focus on the benefits of using virtualization in your computer lab.
A computer lab is the one common denominator in virtually (there goes another pun) every school we have managed.  Computer labs come in all sizes, shapes, and conditions. Although universal in usage, they vary widely in functionality, ranging from a collection of mostly broken, outdated computers donated to you after the end of their useful life to a collection of brand new ‘out of the box’ desktops.

Regardless of circumstance, there seems to be 5 universal challenges associated with computer labs:

1. Cost to acquire the hardware, network, and installation
2. Cost to maintain the high usage in a semi-hostile environment
3. Noise and heat levels that can distract students
4. Distractions of an endless variety  (as in the internet) during instruction
5. Consistent computing environment, especially during testing

Managing your computer lab may in fact be the most time consuming technical support requirement in your school. That tends to be the case in schools with higher grade levels (see my previous article about managing computers in a hostile environment). So in addition to reducing upfront costs, reducing ongoing costs will also be of great benefit.

 

There are many virtualization solutions available that address computer desktops (as opposed to servers), but don’t invest a lot of time exploring them.  In my view there is only one solution that adequately addresses the specific challenges associated with the computer lab in education.

 

That solution is Windows MultiPoint Server 2011, a computer operating system designed specifically for the computer lab at your school. It is the only solution that addresses the above listed challenges completely.

 

Let’s look at each one:

 

1. The cost savings experienced is directly proportional to the number of multi seat sessions you provision per server. We have tested 5:1 (five computing session to one server), but Microsoft advertises up to 20:1. Even at 10:1 you are only buying a fraction of the computer hardware.
2. There are no moving parts in the T200 Zero Clients we recommend, no hard drives, cooling fans, disk caddies, etc. Far fewer parts require far fewer repairs. Your administrative costs for the lab will plummet.
3. Put 25 – 30 computers in an average sized room and you are going to have heating and cooling issues. And the noise level of that environment has never been conducive to instruction and learning.
4. Having tried to instruct adults in technology training with the internet staring them in the face is a challenge. With kids it is nigh unto impossible. With MultiPoint Manager you control access to the internet, and point all computing sessions at once to where you want the students to go.
5. Testing preparation becomes a breeze. You simply sign in differently on testing day and the students are presented with a sterile testing environment, with appropriate controls in place to insure testing integrity.

A worldwide study conducted by Forrester Research concluded the following with respect to Microsoft MultiPoint Server technology:

 

• Teachers and students report that using a Windows MultiPoint Server 2011 station is as good, in terms of speed and performance, as if they were working on a traditional personal computer. 
• Overall student energy and enthusiasm is boosted when more students have a modern computing station to work on, instead of sharing an older machine and dated operating system amongst their classmates or having no computer access in the classroom at all.
• Teachers very much appreciate the administration and monitoring capabilities of the new MultiPoint Manager, with which they can direct and control class and individual students' lessons more effectively. The console is reported to be easy to learn, even for non-English speaking and non-technical instructors. 
• A Windows MultiPoint Server 2011 system is relatively easy to set up and deploy, according to interviewees. This is especially valuable for schools in remote areas where IT skills are scarce.
• Power cost reductions are important in the many areas of the world where electricity is a large line item in the school's budget — assuming it is available. 
• The overall cost savings compared to a traditional PC environment is substantial and analyses of these costs comprise the bulk of this study.  All schools reported being able to re-allocate these savings to other assets for enhancing the education of their students.

So there you have it. A three part series about what you need to know regarding Virtualization. For most of you, the sweet spot will be your computer lab(s). Using virtualization will reduce both the initial and ongoing costs of the computer lab, improve the learning environment, and simplify life for your teachers.

And I will virtually guaranteed (my final pun) you will love it. Our early adopters are already coming back for more.

One final note; in order to use MultiPoint Server 2011, you will need to address your Microsoft software licensing. See my earlier article about this subject.  After all, you don’t expect Microsoft to allow creation of all those virtual computers without licensing them!

Virtualization - Part 2: Which Virtualization Solution Should I Use

Wading through the vast array of virtualization solutions is a challenge and frankly it will mostly be a waste of your time, until you focus on a specific solution needed for your school. I emphasize “specific”, because sometimes the process associated with the high tech virtualization strategy is a very low-tech and practical need to just get something done without an army of Network Engineers and a couple of hours on the phone with technical support.

You can virtualize servers, if you have a need to either consolidate physical hardware or add another server for a specific application. You can virtualize desktops and launch them in thin client sessions to create a sterile computer lab environment (such as required for testing). Or, you might want to use virtualization as part of your backup strategy for mission critical applications, such as computers running your financial software.

Whatever your circumstances, be sure you have a solid business case for implementing a virtualization strategy. Don’t get sucked into the IT department’s love affair with virtualization without a compelling solution attached to it. The one certainty about virtualization is that it will virtually guarantee (another intended pun), that your IT team will be on the payroll for as long as you keep that virtualized environment in place. This is a pretty complex solution, even for those of us in the business.

Here are three very specific examples of where we have used virtualization to the benefit of our school partner:

VoIP Management Server: Due to growing pains, one of our schools needed to setup a remote administration office to accommodate temporary office space during new facility construction. They did not want to spend on infrastructure that would be replaced within a year, and space was very limited.

The VoIP system they setup for the temporary offices required a server for the call manager (PBX functionality).

Using Microsoft Hyper-V technology, we created a VM (Virtual Machine) which had the sole purpose of running the call manager software. There were specific system requirements that differed from the configuration of the host server, otherwise we would not have needed a VM in the first place.

It ran flawlessly for the period of about 24 months (ever heard of construction delays) and then we decommissioned that VM and moved to the new facilities. Mission accomplished.

The business case for this virtualization was temporary computing requirements with the least amount spent on hardware, software, and electricity.

Server Migration: A rather old and inefficient server at partner school needed replacing. Simple enough, right? Well yes, except the school financial system was installed on this server and the orders were to not to interrupt it. It also did after hours synchronizing with a district system, which required point in time coordination.

Quick is not something that can be guaranteed with a single network engineer managing an entire school on one day per week (our model). So we employed a virtualization strategy.

The solution was to configure a VM and work through all of the network connection issues, configuration, and testing. Then at a pre-appointed time we quickly took a snap-shot (image) of the operating server and virtualized it. This VM then ran for a period of several weeks giving us plenty of time to install and configure the new physical server, without pressue on our part or interruption on theirs.

Why did we not simply keep running the financial system as a virtual machine? Good question, although it could have in theory been easily done. There were ownership (as in the district’s property) and licensing issues that drove the decision.

The business case for this virtualization was a time critical server migration. Not just the length of time it took, but the point(s) in time requirement as well.

Computer Lab:  A thoroughly trashed computer lab at one of our partner schools needed replacing, but budgets were very tight. We needed to find a way to refurbish/replace the computer lab for well under $10, 000 with the specific requirement to make them easy to use for state mandated testing.

If you read between the lines, what the administrator was trying to avoid was that very stressful “day of testing” computer problem nightmare you have all experienced.

Our virtualization solution in this situation was Windows MultiPoint server connected by HP Zero Clients. Using MultiPoint server, we were able to reduce the cost of the lab by 75% (we set up in a conservative 5 – 1 ratio) and provide a sterile computing environment on testing day.

The setup was easy, because MultiPoint Server 2011 is designed specifically to recognize and configure the HP Zero Clients. And after downloading the states thin client setup utility, we were able to quickly boot into a “Sterile” testing environment. That is where all computer sessions are identical, locked down, ready for testing, and capable of being administered by a proctor.

The business case for this virtualization was not only cost, but in delivering a sterile computing environment, (as we defined above).

Summary

Virtualization is a mature and well adopted technology used worldwide in a variety of circumstances. It may indeed be appropriate for you to consider. Before doing so, identify a specific computing problem and desired outcomes and a budget before calling your IT provider.

Hopefully your IT provider is wise enough to guide you in selecting your virtualization strategy, software provider, and configuration to accommodate your business case. And if you have a requirements for a temporary, time critical, or specific computing environment; then virtualization is likely a good choice.

And that’s virtually all I have to say about it… until next week. We’ll look a little deeper at virtualizing your computer lab.

Virtualization - Part 1: What is Virtualization and do I need it?

This article reminds me of a little boy who went to his father with a question, to which his father replied "Son, why don't you go ask your mom?" Knowing all too well this outcome, the little boy answered in exasperation, " Because, I didn't really want to know that much!"

The buzzword of "Virtualization" may just be this kind of subject for you. But more and more service providers are doing some kind of virtualization, so you might want to at least have a conceptual view.

In all honesty, I think some service providers virtualize infrastructures to make them so complicated that the school is held virtually captive (pun intended) and fearful of trying to manage the systems for fear they will disappear into thin air. Which, come to think of it, is actually quite possible...

Let's try to reduce the concept of virtualization sufficient to enable a decision about the technology and if it is right for you. Be patient this will take a few articles.

A virtual computer is a digital representation of another fully functional computer (the guest), which resides inside of a physical computer (the host). Wikipedia defines it thus: A virtual machine (VM) is a "completely isolated guest operating system installation within a normal host operating system".

Virtualization evolved from a fundamental economic requirement to reduce the cost of buying, housing, powering, and securing (think backups) of computers; mainly server class computers. It has been an exceptionally profitable undertaking.

I recall visiting one data center, and this was not a small single story building, with floors and floors of nothing but server computers. On a given floor there were rows and rows of racks filled with stacks of server computers, probably numbering in the thousands of actual physical servers, normally in a "blade" form factor so they could put more servers in a given rack.

There was an entire staff of network engineers moving through the rows doing some sort of maintenance, upgrades, or complete replacements. It was actually quite impressive, along with being very noisy and uncomfortably warm.

If I were to revisit that facility today, I would expect to see 75% less space being used to accomplish the same mission. Instead of thousands of servers, there might be hundreds. But, each of those servers would be running 10 Virtual Servers, delivering an equivalent in computing capacity.

Virtualization allows companies to dramatically reduce the cost of real estate, hardware, electricity, heating and cooling, and administration of data centers - (roughly in that order of savings). It is a mature and well established industry, with a few key software companies owning most of the market share. The solutions of which I am familiar are VMWare and Microsoft.

What is really cool, if you are a Geek, is that you can actually store an "image" of a virtual machine on a computer hard drive and launch it into action at a moments notice. When you do so, it's like magic - "poof"; and another fully functional computer appears on your network. This Virtual Disk Image (VMWare) or Virtual Hard Drive (Microsoft) can be moved easily to any host capable of powering it up.

Virtual machines have opened up all kinds of possibilities in managing technology at your school. But they are not without cost and may not always be practical in your particular situation. Proceed with care and it may save you a bundle, proceed carelessly and it may cost you your job when everything blows up

We'll explore a few of these ideas in the coming weeks.

Note: I am not an expert in either VMWare or Microsoft Hyper-V, leaders of virtual machine technology. This is not indended to be technical document, rather an overview for our many Charter School Administrators who  may really not want to know that much!

Why you should ban USB drives at school

After spending hours restoring desktops recently, which a clever student had booted from a rogue USB flash drive loaded with Malware, it dawned on me that the convenience of these handy little gadgets might just be overrated. And when combined with the benefits of the cloud, specifically the free cloud available to students via the Office 365 (live@edu) service, the risks vs. benefit ratio has clearly tipped towards risk.

I know it seems like such a simple way to transport data like homework, projects, photos, etc, but it also just as easy to transport utilities that can destroy the hard drives on your computers, take direct control of the underlying computer hardware, or modify computer registry errors in a way that is nearly impossible to repair.

You may have the very best security practices in place, such as a perimeter Unified Threat Management (UTM) device, endpoint Anti-Virus protection, and separate VLans (network isolation), and yet be vulnerable to a meltdown caused by a free download from the Internet attached directly onto a PC in your school. It is nearly impossible to guarantee computer security if there is physical access to the device.

Banning USB devices is one of the simplest and most effective ways to reduce the cost of network administration in your school.

But aside from the security aspects, there are also some real practical benefits of tossing those USB drives. Let’s take a look at the advantages to see if they don’t, in your specific circumstance, outweigh the benefits.

Here are the top 10 reasons why you should ban USB drives at your school, in favor of the cloud:

• 10) Eliminate the cost of purchasing the hardware. At $5.00 - $75.00 ea. (depending on capacity), you could save a bundle of money.
• 9) Reduce the cost of managing the devices – tracking these identical (presumably) looking devices and accounting for them can be burdensome.
• 8) Avoid the cost of replacing the devices – responsibility for replacing the drives when they are lost; placing identity (ownership) upon them is difficult.
• 7) Reduce plagiarism - unauthorized sharing of work is nearly impossible to detect and prevent while using a flash drive.
• 6) Improve collaboration – accountable sharing of work is possible in the cloud, impossible on a flash drive.
• 5) Reduce support costs – time spent unnecessarily managing infected or otherwise misconfigured hardware is a real cost.
• 4) Lower the cost of your infrastructure – spending money on student servers can in most cases be completely eliminated.
• 3) Improving teacher to student interaction – with cloud based services, teachers can simultaneously push information to an entire class of students.
• 2) Increase student access to teachers – individual work can be made available to teachers with no extra effort by the student other than saving the work to their private cloud space.
• 1) Eliminating the excuse of “I forgot my homework, it's on my flash drive!” Homework is always a device away (computer, tablet, phone, etc). Presuming it is done, of course!

There you have it, ten solid reasons to ban flash drives from your school.

Now if you are more gently persuaded, have plenty of resources, and don’t want to offend anyone’s sensitivities, you could adopt a more persuasive approach to the matter by making cloud services available to your students and making flash drives subject to inspection if used on school computers.

Given the chance, smart students will quickly realize the tremendous advantages of using their own private cloud and soon leave their flash drives at home.