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, or 1024 terabytes. It is commonly abbreviated PB. When used with byte multiples, the prefix may indicate a power of either 1000 or 1024, so the exact number may be either:

  • 1,000,000,000,000,000 bytes — 10005, or 1015, or
  • 1,125,899,906,842,624 bytes — 10245, or 250.

The term "pebibyte", using a binary prefix, has been proposed as an unambiguous reference to the latter value.

Contents

[edit] 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]
  • AT&T has about 16 petabytes of data transfered through their networks each day.[2]
  • 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.[3][4]
  • Google processes about 20 petabytes of data per day.[5]
  • 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.[6]
  • Facebook has just over 1 petabyte of users' photos stored, translating into roughly 10 billion photos.[7]
  • Isohunt has about 1.4 petabytes of files contained in torrents indexed globally.[8]
  • RapidShare stated in April 2008 that it had 5.4 petabytes of storage for users.[9]
  • Opera Software noted that in January 2009 its Opera Mini browser was processing more than 1 petabyte of data every month.[10]

[edit] See also

[edit] 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.att.com/gen/press-room?cdvn=news&newsarticleid=26230&pid=4800
  3. ^ http://www.archive.org/about/faqs.php
  4. ^ http://www.computerworld.com/action/article.do?command=viewArticleBasic&taxonomyName=hardware&articleId=9130081&taxonomyId=12&intsrc=kc_top
  5. ^ http://blog.managednetworks.co.uk/it-support/googles-20-petabytes
  6. ^ http://www.interactions.org/cms/?pid=1027032
  7. ^ http://mashable.com/2008/10/15/facebook-10-billion-photos/
  8. ^ http://isohunt.com/forum/viewtopic.php?t=145853
  9. ^ http://en.wikipedia.org/wiki/Rapidshare
  10. ^ http://www.opera.com/smw/2009/01/

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

[edit] External links

Retrieved from "http://en.wikipedia.org/wiki/Petabyte"
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