Tag Archive for 'education'

I Hate the Wind

Do not get me wrong. I am not irrational. The wind in Canada’s Arctic can kill you without hesitation. It can blow at 50 to 80 km/h for days even with a temperature of -30C like today. It shakes the building. It is a constant roaring, whistling, rustling and creaking.

It is hard to walk in it. You have to lean into it with little traction on icy surfaces. When the wind speed changes, you fall over. Going uphill into the wind is harder.

It takes your breath away. Walking into the wind you have to work hard so you need to breathe deeply and all you get is very cold, dry air.

It can freeze your skin in seconds.

It takes away your sense of sight. You cannot see through blowing snow. Sometimes the visibility is only a metre or so. Fortunately, today it is about 300m but I have to take off my glasses or they freeze to my face so I cannot use much of that visibility. Worse, to keep the face from freezing, one has to put up hoods and face masks, restricting the field of view. This causes one to trip over little snowdrifts or lumps of ice.

It takes away your mobility. I am an old man and do not have much mobility to begin so adding a couple of layers of insulation and wind-proofing makes me stiff. Stiffness when trying to dodge the gusting wind is more difficult.

The last little annoyance is the 1cm spark of static electricity one gets when putting the key in the lock. Who needs that?

The end is in sight. The forecast for this storm is that it ends tonight. Three days of this is not bad. It can go on for a week.

Why do I work here? The pay is good. The kids don’t kill each other or their teachers very often (joke…). The kids are very gentle and they need education. Their native language will not get them far in the outside world except as translators so this is extreme ESL teaching. The air and water are very clean except when the wind blows. There are fish, caribou, mussels and berries to eat and space, lots of it. This place is not polluted by people although bureaucracy reigns in the few who are here. Problems like that are opportunities. The wind is just a problem with no opportunity except power generation.

Ravens love it. I stayed home yesterday morning and marked papers. For a break I watched the ravens play in the updrafts near my building. They find it easier to glide around than to sit still on days like this so that’s what they do. They fly acrobatics, mate, and find food, even in the wind. They don’t hate the wind.

Update - while I was writing that, school was cancelled for the day and the weather worsened. Gusts to 74 km/h with temperature of -30C. I will don full body armor to return home this afternoon. Forecast is for more of the same later this week.

Update 2- This morning the sounds of the wind in my apartment had abated. Accordingly, I sallied forth without my facemask on. The first clue was the snowdrift preventing the outer door from opening. I had to batter it down and kick it aside once I got out. The second clue was the snowdrift blocking the door at school. The wind had merely changed direction a few degrees. Wind chill had risen to -56C with winds gusting 58 to 67 km/h, worse than yesterday. The wind was at my back so I had no real problem walking except my glasses iced up. I peeked around them. Forecast is to possibly lighten up tomorrow. That is what they said yesterday…

- Robert Pogson

Reality, What a Concept

My school has a powerful server, idling, and a mess of sissy servers, also idling. Server consolidation is in order. They all run that other OS. They need a server running GNU/Linux to run various web applications. The solution: VirtualBox from Sun Microsystems.

Virtual Box is a hypervisor for virtual machines. One installs VirtualBox, creates and configures as many virtual machines as one needs and installs an operating system in each. I chose GNU/Linux because that is what I am most comfortable using and I have tons of free software for it. On the first one, I installed LAMP (GNU/Linux, Apache, MySQL, and PHP). This lets me add server scripts in PHP to do some very useful things:

  • collaboration/knowledge database with WikiMedia
  • huge number of text files indexed with SWISH-e and searched with swishe.php
  • searchable image gallery with Gallery
  • Moodle course management system

Then, I can create other virtual machines to hold the functions of the lesser servers, mostly print, file-sharing and database.

The only problems I had with this project?

  • the underlying OS was 32bit so I could not install more RAM than 4gB
  • it was tricky to use the NICs on the machine

Even the devotees of that other OS can use this technology and when they want to get off the Wintel treadmill, they can migrate their host OS and their virtual machines one by one making the job much easier. I can OpenSSH into mine to tweak and to manage. I can also control that other OS using Rdesktop (RDP protocol). That works better from a GNU/Linux machine than using the native Remote Desktop from my XP box. The print server no longer crashes weekly if I use GNU/Linux Rdesktop. Interesting, and very real. So, time moves on. If I keep beating my head against that monopolistic wall, it will move.

Lo, and behold, SUN has a new release which deals with both issues.

When my organization is comfortable with GNU/Linux as a guest OS (my boss already uses GNU/Linux at home), they can switch services one at a time to GNU/Linux guests and eventually, only a few databases will remain for compatibility with the mother ship.

So far, VirtualBox has been solid for us. It just works. I did find that the emulated SCSI drive was much faster than the emulated IDE drive which is no surprise if well emulated. The big server is still lightly loaded but now it actually does useful stuff for us besides authentication and DHCP. It could for instance run a basic GNU/Linux terminal server in one of the virtual machines to give a new lease on life to the old thick clients that populate our system.

Virtuality is a wonderful use of the modern multi-core system. I have previously used LTSP which virtualizes the desktop. Now we can enjoy virtualization of the server for similar comprehensive benefits:

  • lower cost of maintenance
  • lower parts count
  • easier administration
  • easier integration of GNU/Linux
  • lower power consumption
  • less congestion in the server room
- Robert Pogson

Excitement About Thin Clients

IDC has issued a press release:”IDC Predicts Current Economic Crisis Still Provides For Pockets Of Opportunities Within The Asia/Pacific (Excluding Japan) Region in 2009

12 Dec 2008

9. Thin Clients Will Ride The Wave Of Cost Cutting And Desktop Virtualization

As the market matures, and better vendor collaboration results in software standards merging, virtualization to cut costs will extend beyond server virtualization in datacenters to virtualizing the desktop. In addition, deploying thin clients and a virtualized desktop environment will also reduce the carbon footprint. IDC is therefore optimistic and predicts that thin-client deployments on the back of desktop virtualization will gain traction in 2009, and further accelerate into 2010, as PC replacement cycles peak across the region. Full year 2009 thin-client shipments are expected to grow within the 12–15% range over 2008, to about 765,000 units.

10. The Economy And Mini-Notebooks Will Challenge The Way Computers Are Used And Sold In Asia/Pacific

IDC expects mini notebooks, a new product category created due to demand for devices that support mobility, to increase from around 5% of total notebooks shipped in the APEJ region in 2008 to more than 10% in 2009. The small cutesy form factor will be the primary selling point, but it will also change the way these devices are being used. With limited processing power and storage, users will be heavily dependent on being connected to the Internet, eventually running applications through the cloud. This demand for connectivity will further change the way mini notebooks are sold – instead of retail stores, partnerships with mobile operators are expected to proliferate with devices sold in service bundles like mobile phones, leveraging operators’ cellular 3G infrastructures. With vendors already looking at ways to overcome the challenges associated with this product category, IDC believes that mini notebooks will change the way traditional notebooks are used and sold.

This reflects the excitement I have been feeling about thin clients in education for several years. They are a great solution for cost-cutting and manageability. Of course, the IDC report is not only about education but the whole market in APEJ. Still, if businesses see the benefit, schools should as well.

The connection with netbooks is that both thin clients and netbooks share common features:

  • low cost
  • low footprint
  • low power
  • low noise

, all bringing value. The lack of horsepower for video is unimportant in many cases and, with the march of Moore’s Law, perhaps this will disappear as an impediment. That leaves the question, Why don’t more systems use thin clients?. I have no answer. Everyone to whom I have shown thin clients loves the improved performance and small footprint. Perhaps not enough people have seen them yet. I intend to change that in a small way at my next conference of teachers. I have a portable lab of thin clients under construction and will show it off with GNU/Linux, standard desktop applications, some particularly useful in education and some web applications like

Perhaps the IT industry is nervous about thin clients. After all, if thin clients cost less and last three times as long, isn’t there less money to be made selling them? Yes, but you should be able to sell many more and the servers to go with them. It is a paradigm shift, not the death of IT.

- Robert Pogson

Madness with lots of Zeroes

An article on ZDnet caught my eye, “Vienna Hobbles Open Source”. Sheesh! Vienna was in the process of migrating to GNU/Linux with OpenOffice.org from 2000. They had about 1000 machines of 32000 migrated when a decision was taken to migrate to Vista/2007. Madness! The rationale? They needed IE to access a particular web app that will have support for FireFox in 2009. They could have paid a fraction of the cost of Vista to accelerate the support for FireFox. Madness! Madness with lots of zeroes.

The original article is here with babelfish’s (strange) version here.

Such is politics. Politicians have the power always but sometimes not the wisdom to wield power well. Anyone who says IEness is not lock-in should read these articles. This is how M$ makes tons of money giving away a product for $0 and violating standards. TFA seems to suggest Vienna is only accounting for licences. What will they do when they find that other OS crawls on their current hardware, add another zero to the cost? How many new toys could they buy or how much of the taxpayers’ money could be saved with those zeroes? If your taxes go to Vienna, you should complain before it is too late.

- Robert Pogson



Archives by Month

My Mission

My observations and opinions about IT are based on 40 years of use in science and technology and lately, in education. I like IT that is fast, cost-effective and reliable. I do not care whether my solution is the same as yours. I like to think for myself.

My first use of GNU/Linux in 2001 was so remarkably better than what I had been using, I feel it is important work to share GNU/Linux with the world. I have been blessed by working in schools where students and school systems have benefited by good, modular software easily installed in most systems.

I have shown GNU/Linux to thousands of students and hundreds of teachers over the years and will continue in some way doing that until I die in spite of the opposition.

Posts

September 2010
S M T W T F S
« Aug    
 1234
567891011
12131415161718
19202122232425
2627282930