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.

Yahoo Messenger Trick

Yahoo Messenger TrickWith this trick you can Open Yahoo Messenger 100000+ Times & if you have more then one Yahoo ID's and you want to open both ID's     
Just follow these simple step :
open "RUN" (Window+R) and type "Regedit"
go to "Curnnt_user" & "Softwares" & "Yahoo" & "Pager" & "test" don't open "Test" and Go to "Draft" on right side and then "right click" select "Dword Value" rename it to "Plural" open it and write in "Value Data" "1" and now Restart your computer and you have done.
Now u can Open 100000 Yahoo! id's in one time.

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