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petabyte

 
Dictionary: pet·a·byte   (pĕt'ə-bīt) pronunciation
 
n.
  1. A unit of computer memory or data storage capacity equal to 1,024 terabytes (250 bytes).
  2. One quadrillion bytes.

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Wikipedia: Petabyte
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Prefixes for bit and byte multiples
Decimal
Value SI
1000 k kilo
10002 M mega
10003 G giga
10004 T tera
10005 P peta
10006 E exa
10007 Z zetta
10008 Y yotta
Binary
Value IEC JEDEC
1024 Ki kibi K kilo
10242 Mi mebi M mega
10243 Gi gibi G giga
10244 Ti tebi
10245 Pi pebi
10246 Ei exbi
10247 Zi zebi
10248 Yi yobi

A petabyte (derived from the SI prefix peta- ) is a unit of information or computer storage equal to one quadrillion bytes (short scale), or 1000 terabytes. It is abbreviated PB. When used with byte multiples, the prefix indicates a power of 1000:

  • 1 PB = 1,000,000,000,000,000 B = 10005 or 1015 bytes

The term "pebibyte", using a binary prefix, is used for multiples of 1024.

Contents

Petabytes in use

  • According to Kevin Kelly of the New York Times, "the entire works of humankind, from the beginning of recorded history, in all languages" would amount to 50 petabytes of data.[1]
  • Teradata Database 12 has a capacity of 50 petabytes of compressed data.[2]
  • AT&T has about 16 petabytes of data transferred through their networks each day.[3]
  • The Internet Archive contains about 3 petabytes of data, and is growing at the rate of about 100 terabytes per month as of March, 2009.[4][5]
  • Google processes about 20 petabytes of data per day.[6]
  • The 4 experiments in the Large Hadron Collider will produce about 15 petabytes of data per year, which will be distributed over the LHC Computing Grid.[7]
  • Facebook has just over 1.5 petabyte of users' photos stored, translating into roughly 10 billion photos.[8]
  • Isohunt has about 1.6 petabytes of files contained in torrents indexed globally.[9]
  • RapidShare stated in April 2008 that it had 5.4 petabytes of storage for users.[10]
  • Opera Software noted that in January 2009 its Opera Mini browser was processing more than 1 petabyte of data every month.[11]
  • BBC iPlayer streams 7 petabytes of content per month[12]

See also

References

http://www.dell.com/downloads/global/casestudies/580_Dell_Case_Study_mp_v2.pdf

External links


 
Best of the Web: petabyte
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Some good "petabyte" pages on the web:


Math
mathworld.wolfram.com
 
 
 
Learn More
peta– (prefix)
NIST binary (technology)
XLDB

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Copyrights:

Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2007. Published by Houghton Mifflin Company. All rights reserved.  Read more
Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Petabyte" Read more