Demystifying BigTable & HBase

Much hype has been created around 'Column' oriented database, and it is difficult to find a simple explanation of the concepts.

Thinking over it initially can overload one with lot of questions to the point of completely questioning the rationale behind such radical change. However companies like Google, Yahoo and Facebook would not use it if its merit was questionable.

Here is a very interesting read on the concepts behind column oriented database.

Column oriented database concepts - demystified

Widgets - Create vs Add

Widgets are small snippets of code that one can embed in their website (manually insert the snippet code in their website's source code).

While any Tom, Dick, Harry can 'Add' a widget (multiple widgets) on their sites, it is a totally different ballgame how a publisher provides data to widget call coming from such users.

I wanted to get into the technical details of how a widget is 'Created' by the provider and found this link a very interesting read.
How to build a web widget