Cloud computing

1.1 What is Cloud Computing?

Cloud computing is buzzing word now-a-days. But what does it really mean? Do you have to be sitting on a mountain with your computer among the clouds? Or on a plane with a laptop? Does it work when its sunny? Can you actually type on a cloud computing keyboard?
According to Wikipedia, Cloud computing is a virtualized computing platform that provides infinite resources for running your applications. It leverages economies of scale to save you money by only requiring you to pay for what you use.
But cloud computing is more big than that definition. And its growing bigger every day. There are basically 3 layers of cloud computing. Application, platform and infrastructure. Companies use them differently based on what they offer.
At the bottom of the foundation, the infrastructure. This is where things start and where people began to build. This is the layer where cloud computing lives.

Return to old facebook chat [FB chat sidebar disabler]

Well, facebook is changing its UI to add new features like voice and video chat. Recently it has changed the old chat interface and replace with a new chat side bar where all of your friends are visible without groups. Well many of the facebook users did not like new way of FB chat system. And I was also one of them :(. I was also a unhappy user until i found a suitable firefox addon to disable that shit and got back the old style facebook chat. Thanks to "VittGam" for his efforts to make  FB Chat Sidebar Disabler extension for firefox, chrome and opera.

FB chat sidebar disabler for firefox

Risks of Geotagging - Are You Concerned?

You own a pretty new smart phone as example iPhone or Android. You take pictures with your smart phone and post them online. Just a case: You took a photo of your car and posted it to your Twitter account with the caption "off to work." Another case: Moment is special to you, your kid just learned how to ride a bike without training wheels. So you fire up your iPhone's camera, took a picture,upload the image to Twitpic, and share the evidence of your kid's triumph via Twitter.
So what’s the worst thing that could happen? What personal information could possibly be exposed? Where’s the threat? In both cases when you post the pictures, you are actually allowing about 190 million Twitter users implicitly to know the exact location of you and your kid. Unfortunately, even as careful as some people may be about sharing personal information online, they may be unwittingly exposing information through a process called “geotagging.” So how does this data end up on a public forum like the Internet?

Increase browsing speed little more by using own DNS resolver server.

Using self hosted DNS server can get your browsing speed little bit faster. Because it will be reducing your round trip time for a DNS query. Look the below pictures.

 The above picture shows that when I am using my ISP's DNS server there is approx. 51 ms of round trip time for communicating with that server.

Taking Advantage of Public DNS to improve Browsing Experience

Sometimes using public dns servers for resolving dns queries can get you better browsing experience. Well I am not saying that public dns servers like google dns, ultra dns or open dns are faster than your local/isp's dns servers. But sometimes public dns servers can give you better Internet experience if properly used along with your isp's dns server. If you want the fastest dns query results then it is suggested to setup your own dns server on your network.

In my case I was facing slow Internet browsing when my isp's dns server is overloaded with dns query requests on pick hours. So I started to use google public dns along with my isp's dns and dramatically my problem got solved.