Which database does Facebook & Google use ?

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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.
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How can you make the sound work in safe mode?

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It is possible to make sound work on Safe Mode.
  1. Press Windows + R, type devmgmt.msc, press Enter and look for your sound device. (e.g. Reatlek High Definition Audio) Double-click it.
  2. Go to the tab 'Details' and click the drop-down list. Select 'Driver key' and copy the text from 'Value'
  3. Copy the text into a word processor (e.g. Notepad)
  4. Replace all lower-case letters with capital letters and remove the \0000.
  5. Open Registry Editor (Windows + R > regedit) and locate HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBoot\Network.
  6. Create a new key (Rightclick > New > Key)
  7. Copy the text from your word processor and paste it into the key name.
  8. Edit the '(Default)' key and type 'Sound, video and game controllers'.
  9. Create a new key called 'AudioEndpointBuilder', 'MMCSS' and 'Audiosrv'
  10. Edit all their '(Default)' keys and type 'Service'.
  11. Restart your computer
  12. Go to Services (Windows + R > services.msc) and start Multimedia Class Scheduler and Windows Audio Endpoint Builder.
  13. Then start Windows Audio Service
...THANKS...



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