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.

How to Speedup Your Internet connection

Microsoft reserves 20% of your available bandwidth for their own purposes like Windows Updates and interrogating your PC etc. Don't you want to get it back for your self?
Here is the trick how to get 100% of your available bandwidth.
Step 1: Click Start then Run and type "gpedit.msc" without quotes.
This opens the "group policy editor" and go to: "Local Computer Policy"
Step 2: Then click on "Computer Configuration" Then "Administrative Templates"
Step 3: Now select "Network" then "QOS Packet Scheduler"
Step 4: After that select "Limit Reservable Bandwidth".
Step 6: Double click on Limit Reservable bandwidth. It will say it is not configured, but the truth is under the 'Explain' tab i.e." By default, the Packet Scheduler limits the system to 20 percent of the bandwidth of a connection, but you can use this setting to override the default."
So the trick is to ENABLE reservable bandwidth, then set it to ZERO. This will allow the system to reserve nothing, rather than the default 20.

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Which database does Facebook & Google use ?