Petabyte


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

  1. ^ Kelly, Kevin (2006-03-14). "Scan This Book!". New York Times. http://www.nytimes.com/2006/05/14/magazine/14publishing.html. 
  2. ^ http://www.teradata.com/t/products-and-services/database/teradata-12/
  3. ^ http://www.att.com/gen/press-room?cdvn=news&newsarticleid=26230&pid=4800
  4. ^ http://www.archive.org/about/faqs.php
  5. ^ http://www.computerworld.com/action/article.do?command=viewArticleBasic&taxonomyName=hardware&articleId=9130081&taxonomyId=12&intsrc=kc_top
  6. ^ http://portal.acm.org/citation.cfm?doid=1327452.1327492
  7. ^ http://www.interactions.org/cms/?pid=1027032
  8. ^ http://www.facebook.com/note.php?note_id=76191543919&ref=mf
  9. ^ http://isohunt.com/forum/viewtopic.php?t=145853
  10. ^ http://wiki.xiaoyaozi.com/en//Rapidshare
  11. ^ http://www.opera.com/smw/2009/01/
  12. ^ I Pro Portal - "iPlayer Streams 7 Petabyte Of Content Per Month, Coming to Freeview Soon"Accessed 9 May 2009

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