Ask the Expert

What is a petabyte?

What is a petabyte?

    Requires Free Membership to View

To understand what a petabyte is, one needs to start at the beginning...

As you may already know, a byte is a unit of storage in the database. On a basic level, one byte is equivalent to one character. A kilobyte (kilo meaning 1,000) is roughly one thousand bytes. Since computers are binary (base two) systems, we have to use 2 to the power of 10 which is 1,024. So in reality, one kilobyte (KB) is 1,024 bytes. We then use the following chart for Megabytes (MB), Gigabytes (GB), Terabytes (TB) and finally Petabytes (PB):

1 KB = 1,024 bytes
1 MB = 1,024 KB
1 GB = 1,024 MB
1 TB = 1,024 GB
1 PB = 1,024 TB

This gives us 1 Petabyte (PB) = 1,024 TB = 1024*1024 GB = 1024*1024*1024 MB = 1024*1024*1024*1024 KB = 1024*1024*1024*1024*1024 bytes = 1,125,899,906,842,624 bytes or roughly 1,000 trillion bytes!!!

For More Information

  • What do you think about this answer? E-mail the editors at editor@searchDatabase.com with your feedback.
  • The Best Oracle Web Links: tips, tutorials, scripts, and more.
  • Have an Oracle or SQL tip to offer your fellow DBAs and developers? The best tips submitted will receive a cool prize. Submit your tip today!
  • Ask your technical Oracle and SQL questions -- or help out your peers by answering them -- in our live discussion forums.
  • Ask the Experts yourself: Our SQL, database design, Oracle, SQL Server, DB2, metadata, object-oriented and data warehousing gurus are waiting to answer your toughest questions.

This was first published in January 2002

There are Comments. Add yours.

 
TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to: