On Wed, 19 Feb 2014 17:29:17 -0500, John Gilmore wrote:
>Curtis G Pew wrote:
>
><begin extract>
>I think one of the folks involved in Solaris zfs (not to be confused
>with OMVS zFS) calculated that the entropy generated by a full 128-bit
>address space would result in enough heat to boil all the oceans on
>earth. So I believe 128 bits is enough for a long time.
></end extract>
>
>and I am puzzled. Is this entropy the entropy of thermodynamics or
>information theory? The quantity having the dimensions J/K, Joules
>per Kelvin?
>
I'd be tempted to start here:
http://en.wikipedia.org/wiki/Holographic_principle#Limit_on_information_density
Which I don't understand at all. But Wikipedia Is Always Right. And follow the
link to Bekenstein Bound:
... It implies that the information of a physical system, or the
information necessary
to perfectly describe that system, must be finite if the region of space
and the
energy is finite. ...
So you need either a bigger storage warehouse or a hotter storage warehouse.
And if you try to make your storage system too small, the necessary mass-energy
will suck it into a black hole.
128 is much bits.
-- gil
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