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[OT] a little calculation (Re: [Gnu-arch-users] Newbie - don't quite und
[OT] a little calculation (Re: [Gnu-arch-users] Newbie - don't quite understand tagging method)
Fri, 28 Nov 2003 10:36:42 +0900 (JST)
On Thu, 27 Nov 2003 19:25:27 -0500, Charles Duffy <address@hidden> said:
> So, don't trust random numbers for your uuids, despite the fantastically low
> probability of a collision and the fact that arch will inform you if one
> somehow occur? Use "uuidgen -t"!
a little calculation.
[Radius of Earth]
R = 6 * 10^6 [m]
[Surface of Earth]
S = 4 * pi * R^2
=~ 450 * 10^12 [m^2]
[simple probability to select a specific UUID]
p = 1 / 2^128
=~ 3 * 10^-39
[1 UUID's surface relative to Earth's]
s = s * p
=~ 1.4 * 10^-24 [m^2]
= 1.4 [Angstrom^2]
The world of Bohr radius ...
Re: [Gnu-arch-users] Newbie - don't quite understand tagging method, Robert Anderson, 2003/11/27