Search This Blog

Wednesday, February 15, 2012

FYI-Multiples of bytes-- BIG DATA is BIG!!!

Multiples of bytes
SI decimal prefixes Binary
usage IEC binary prefixes
Name
(Symbol) Value Name
(Symbol) Value
kilobyte (kB/KB) 103 210 kibibyte (KiB) 210
megabyte (MB) 106 220 mebibyte (MiB) 220
gigabyte (GB) 109 230 gibibyte (GiB) 230
terabyte (TB) 1012 240 tebibyte (TiB) 240
petabyte (PB) 1015 250 pebibyte (PiB) 250
exabyte (EB) 1018 260 exbibyte (EiB) 260
zettabyte (ZB) 1021 270 zebibyte (ZiB) 270
yottabyte (YB) 1024 280 yobibyte (YiB) 280

A petabyte (derived from the SI prefix peta- ) is a unit of information equal to one quadrillion (short scale) bytes, or 1000 terabytes. The unit symbol for the petabyte is PB. The prefix peta (P) indicates the fifth power to 1000:

1 PB = 1000000000000000B = 10005 B = 1015 B = 1 million gigabytes = 1 thousand terabytes

But, in traditional binary usage, there are 1 125 899 906 842 624 bytes in 1 petabyte.

The pebibyte (PiB), using a binary prefix, is used for the corresponding power of 1024, which is more than 12% greater.

The unit petabyte is sometimes used for the corresponding power of 1024, following traditional designations of computer storage size, a practice superseded by modern conventions.

No comments:

Post a Comment