Petabytes

A petabyte is a unit of information storage whose symbol is PB, and is equal to 10¹⁵ bytes = 1,000,000,000,000 000 bytes. The prefix peta comes from the Greek πέντε, which means five, as it is equivalent to 1000⁵ or 10¹⁵. It is based on the model of tera, which comes from the Greek for "monster", but which is similar (except for one letter) to tetra-, which comes from the Greek word for "four" and thus peta, which comes from penta-, loses the third letter, the “n”

1 PB = 10¹⁵ byte = 10¹² kB = 10⁹ MB = 10⁶ GB = 10³TB. 1024 petabytes equals one exabyte.

Examples

• Internet Archive has about 70 petabytes of data.

• Google processes about 20 petabytes of data every day.
• In December 2007, YouTube had a traffic of 27 petabytes.
• The Great Hadron Colisionator generates about 20 petabytes of useful data per year.
• Filming a person's life (100 years) in high definition (10 megapixels, 50 frames per second) would occupy 0.5 petabytes. Without taking into account, format or video encoding, or audio.
• Facebook has 60 billion images, which means 1.5 petabytes of storage and grows at a rate of 220 million images per week.
• Isohunt has 1,6 petabytes indexed torrent files.
• AT strangerT transfers through its networks around 16 petabytes of data a day.
• Megaupload got 25 petabytes of files before closing.