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# What is the meaning of Petabyte? Concept and Definition of Petabyte

## Definition of Petabyte

### 1. Concept of Petabyte

Everyone who uses Internet and computer is more or less familiar with certain terms, such as download, gigabytes, memory RAM, HD, etc. But not everyone knows or has notion of the meaning of some terms in quantitative (speaking in bytes). Everyone knows that it has "many files" and that they are "very heavy on the hard disk".
In the world there are hundreds of millions of computers, supercomputers, servers and users who manipulate those machines and produce and transform data. And speaking of data, then, we give you information that will surprise you...

#### What is a Petabyte?

A petabyte is a unit of storage whose symbol is PB, and is equivalent to 1024 Terabytes = 1.125.899.906.842.624 bytes. A Terabyte, of course, are 1024 Gigabytes. 1 Gigabyte = 1024 Megabytes.

To try to understand what is a Petabyte:
-1 Petabyte is sufficient for storing 13.3 years of HD video
-1.5 Petabytes are necessary for storing 10 billion Facebook photos
-Google processes around 24 Petabytes of information per day.
-Avatar, James Cameron's 2009 film, used 1 Petabyte of information for special effects.
-AT & T, the carrier of the iPhone in the United States, transmitting 19 Petabytes of data per month.

### 2. Meaning of Petabyte

A petabyte is a unit of storage whose symbol is PB, and is equivalent to 1015 bytes = 1 000 000 000 000 000 bytes. The prefix peta comes from the Greek πέντε, meaning five, because it is equal to 10005 or 1015. Is based on the model of tera, which comes from the Greek 'monster', but which is similar (except a letter) to tetra-, which comes from the Greek word for four and so peta, it comes of penta-, lost the third letter, the n.
1 PB = 1015 byte = 1012 kB = 109 MB = 106 GB = 103 TB
1000 petabytes equals an exabyte.

Units of information (of Byte)
International system (Decimal) ISO/IEC 80000-13 (binary)
Multiple - (symbol) IF Multiple - (symbol) ISO/IEC
kilobyte (kB) 103 Kibibyte (KiB) 210
Megabyte (MB) 106 Mebibyte (MiB) 220
Gigabyte (GB) 109 Gibibyte (GiB) 230
Terabyte (TB) 1012 Tebibyte (TiB) 240
Petabyte (PB) 1015 Pebibyte (PiB) 250
Exabyte (EB) 1018 Exbibyte (EiB) 260
Zettabyte (ZB) 1021 Zebibyte (ZiB) 270
Yottabyte (YB) 1024 Yobibyte (YiB) 280

#### Examples

• The Gangnam Style of PSY video obtained more than 3 petabytes of traffic in its music video hosted on the YouTube video site.
• Internet Archive has around 2 petabytes of data.
• Google processes over 20 petabytes of data every day.
• The large Hadron Collider generates about 20 petabytes of data per year.
• Film the life of a person (100 years) in high definition (10 megapixels, 50 frames) per second would occupy 0.5 petabytes.
• Facebook has 60 billion images, representing 1.5 petabytes of storage and grows at a rate of 220 millions of images per week.
• Isohunt has torrent files indexed by value of 1.6 petabytes.
• AT & T transferred by their networks around 16 petabytes of data per day.
• Megaupload took to 25 petabytes of files before it closed.

### 3. What is a Petabyte

The byte is part of the so-called information units. It is equivalent to eight bits and allows, through its multiples, refer various measures of storage.
A petabyte, in this sense, is a multiple of the byte which is equal to 1.000.000.000.000.000 bytes (i.e., ten high to the fifteen bytes). It's a unit larger than the gigabyte or terabyte, but smaller than units such as the exabyte, the zettabyte or the yottabyte.
The petabyte is 1,024 terabytes. This measure can "decompose" in other smaller units, since the terabyte is equivalent to 1,024 gigabytes, the gigabyte to 1,024 megabytes, 1,024 kilobytes to megabyte and kilobyte to 1,024 bytes.
The use of each unit of information depends on the context. Some information is so great that it is impracticable to quantify through units like bytes or kilobytes. At the same time, it has no logic mention digital files that present little information through a unit as the petabyte.
The Petabyte, are therefore used to name very large information flows. The traffic of the world's most popular sites, data processed by search engines such as Google or transfers that take shape in the main Internet providers networks be estimated Petabyte since they represent very high figures. If someone would like to name the data processing Google in one month by amounts of kilobytes, for example, would have to appeal to a high amount of zeros that your notation would be unintelligible.

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