Server Virtualization Is Growing

Posted on June 2nd, 2010 by Victoria Pal in Tech

Server Virtualization"I think there is a world market for maybe five computers" is a famous misquote of Thomas J. Watson. The same Tom Watson, who took Computing Tabulating Recording Corporation and turned into what is today known as IBM. In essence, whoever said that the world will only need 5 computers wasn't totally wrong. Virtualization was first implemented in 1960 to aid better utilization of large mainframe hardware. 50 years later, it has grown to be part of all Fortune 100 success stories.

Lately, "fake servers" became a slightly satiric way to say "virtual servers". Why? Mainly because they are gaining a larger market share. Large enterprises were quick to adopt the virtual machines approach, while small business started late. However, by year-end 2010, enterprises with 100 to 999 employees will have a higher penetration of virtual machines deployed than the Global 500. For long years, small businesses could not afford even the entry level products, and this is what changed lately. Increased competition by server vendors has made server virtualization technology affordable to smaller companies.


What Happened With the Free Shell Accounts?

Posted on June 1st, 2010 by Victoria Pal in Tech

The last time I used a decent free shell account was back in 2002. Back then a friend told me about a free shell accounts provider They gave me everything I needed – lynx, web space, email, IRC and even ICQ. IRC access via shell was quite popular amongst friends, who wished to have some fun with people they know, while remaining anonymous. Probably this was one of the reasons for Zippy to close down. Well, that and lack of donations I guess, regular hack attempts, and general abuse as well. The main problem with free services is that when they get exploited, they get exploited a lot.

shell account example


A PDA or a Tiny Server?

Posted on May 26th, 2010 by Victoria Pal in Tech

I previously owned an Acer N50. By modern standards the PDA is outdated. When I sold it the first thing a teenager asked me was "Is the mobile phone in it working OK?" Sadly, no, it does not have a mobile phone in it. It's that old now. Despite that fact it was a great PDA when it was released and still got a lot to offer 4 years later.

Two of its functionalities really gave the Acer N50 a purpose in present times. First of all, it had a USB host function. Not common for pocket PCs in 2005 and still not part of many handheld devices nowadays. This function alone enabled the device to recognize several other devices, such as USB sticks and generally all available USB hardware (well, if drivers are present). In addition, WiFi reception was pretty good too. A network adapter of any kind provides great connectivity options.


The 100% Server Uptime Illusion

Posted on May 25th, 2010 by Victoria Pal in Tech

100% server uptimeYou've seen 98.9%, 99.9% and even 100% server uptime labels on hosting sites. The first thought which comes up to people is "Well, 99.9% sounds pretty well, 0.01% is no big deal" and they are right. The fact many people are missing is the fact that even if the server is reachable, it doesn't necessarily mean it's fully functional. So many other things can go wrong with a server. A 99.9% uptime sticker is no guarantee that your business won't face other problems, while the server is up and running. Hosting providers calculate uptime in ways that aren’t intuitive from a user’s perspective, not taking in account certain website downtime.

  • First of all, not all downtime is counted. Scheduled maintenance is not part of the equation. Several hours of downtime is not what hosting companies would include. When monthly server uptime is calculated, such planned service interruptions are not included (deducted).
  • Some, if not most, hosting providers tend to overlook shorter downtime periods. 3-5 minutes of unavailability are not considered significant and don't end up on the 99.9% sticker. You can see how multiple short downtime periods can make a difference at the end of the day.
  • 0.01% means twice the trouble. 99.9% uptime means 8 hours and 45 minutes downtime per year. So when you go down a notch to 98.9%, your calculated downtime goes up twice to 17 hours and 30 minutes.
  • Resources are limited. "Unlimited" is just a nice way to sugarcoat "enough for the majority of common users". Your business might not be a common one and demand might be high. There might be other significant sites, sharing the same hosting hardware. At one point it can all build up to an overload, resulting in poor loading times, broken transactions, even website. The server will still be online, but the performance won't meet your needs. Application monitoring is a good way to find out such problems quick and easy.

100% uptime is not feasible. Eventually something will go wrong. Network backbones will cause problems, power failures will happen, server software and hardware will fail every now and then and human error will always be a considerable factor. So, my advice is: Don't try to find the ultimate provider, as it doesn't exist. Instead find a decent provider with good server uptime and performance, 24 hour technical support and frequent backups. Oh, and why don't you go for a nice remote website monitoring service, just in case. It might be the best money you have ever spent.


Google Servers - The Old, The Small and The Container

Posted on May 20th, 2010 by Victoria Pal in Tech


Servers come in different shapes and sizes. They serve different purposes. Sometimes they are dedicated and sometimes they fulfill various tasks. A common impression of a server looks pretty much like the image on the left - hard drivers, a lot of circuit boards, numerous cables and a huge server rack to house it all. Curiously, this is Google's first production server (about 10 years old). This server, along with about 30 others, is what allowed the company to grow big at a minimal cost.