Which database does Facebook & Google use ?

Facebook has moved to a NoSQL database named HBase. Google uses their own system called BigTable. What is NoSQL ? NoSQL is a term used to designate databases which differ from classic relational databases. NoSQL database management systems are useful when working with a huge quantity of data when the data's nature does not require a relational model. The data can be structured, but NoSQL is used when what really matters is the ability to store and retrieve great quantities of data, not the relationships between the elements.

Historic 100th mission of ISRO on the move !



Preparations for the historic 100th mission of the Indian Space Research Organisation (ISRO) were on with the space agency planning to launch PSLV C-21, which will carry two foreign satellites in September.
“We have two capsules, a remote sensing satellite from France and a small Japanese satellite will be the co-passenger. Preparations are going on. We plan to have the launch in the second week of September,” ISRO Chairman Dr K Radhakrishnan said at the Chennai airport on Wednesday.

ISRO plans to launch 720-kg SPOT-6 remote sensing satellite from France (built by ASTRIUM SAS) and a 15-kg Japanese spacecraft Protiers on board the home-grown Polar Satellite Launch Vehicle (PSLV-C21) in September, in what is perceived as a major milestone of sorts.

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Which database does Facebook & Google use ?