Redis at NOSQL Playground
NOSQL is a movement is around for long time ago but since 2009 is getting stronger and more consistency. Relation data based have they place and they always will have BUT besides the scalability that in some scenarios is more a matter of cost in other Relations Databases is really the wrong choice not just because scalability BUT is a matter of design and complexity X simplicity. The Right structure have a huge impact on the complexity/simplicity of the code and design and have said that this maybe or may not create performance issues. Is a common sens that Relational Databases have beens overused in this last 3 decades. There a debate about the name, my take on that is that is not only SQL and you must consider different databases or data structures in your solution toolbox.