:D Dave :) On Tue, Nov 11, 2008 at 10:18 AM, David R. Wilson <[EMAIL PROTECTED]> wrote:
> > Just turn off the banks and Governments computers. Everything else will > follow. > > Dave > > > On Tue, 2008-11-11 at 08:29 -0600, Jack Coats wrote: > > That means: turn off all computers and cell phones and global warming > > goes away? ;) > > > > Andrew Farnsworth wrote: > > > I found the following quote on the wikipedia page for the ZFS file > > > system (http://en.wikipedia.org/wiki/ZFS) > > > > > > Quoting Jeff Bonwick (http://en.wikipedia.org/wiki/Jeff_Bonwick) > > > > > > Although we'd all like Moore's Law > > > <http://en.wikipedia.org/wiki/Moore%27s_Law> to continue forever, > > > quantum mechanics <http://en.wikipedia.org/wiki/Quantum_mechanics> > > > imposes some fundamental limits on the computation rate and > > > information capacity of any physical device. In particular, it has > > > been shown that 1 kilogram <http://en.wikipedia.org/wiki/Kilogram> of > > > matter confined to 1 litre <http://en.wikipedia.org/wiki/Litre> of > > > space can perform at most 10^51 operations per second on at most 10^31 > > > bits of information.^[10] > > > <http://en.wikipedia.org/wiki/ZFS#cite_note-9> A fully populated > > > 128-bit storage pool would contain 2^128 blocks = 2^137 bytes = 2^140 > > > bits; therefore the minimum mass required to hold the bits would be > > > (2^140 bits) / (10^31 bits/kg) = 136 billion kg. To operate at the > > > 10^31 bits/kg limit, however, the entire mass of the computer must be > > > in the form of pure energy. By E=mc², the rest energy of 136 billion > > > kg is 1.2x10^28 J <http://en.wikipedia.org/wiki/Joule>. The mass of > > > the oceans is about 1.4x10^21 kg. It takes about 4,000 J to raise the > > > temperature of 1 kg of water by 1 degree Celsius > > > <http://en.wikipedia.org/wiki/Degree_Celsius>, and thus about > > > 400,000 J to heat 1 kg of water from freezing to boiling. The latent > > > heat of vaporization adds another 2 million J/kg. Thus the energy > > > required to boil the oceans is about 2.4x10^6 J/kg * 1.4x10^21 kg = > > > 3.4x10^27 J. Thus, fully populating a 128-bit storage pool would, > > > literally, require more energy than boiling the oceans.^[11] > > > <http://en.wikipedia.org/wiki/ZFS#cite_note-10> > > > > > > > > > Nothing like imposing some hard limits on a system :-) > > > > > > Andy^ > > > > > > > > > > > > > > > -- Chris Faulkner 615-653-4400 (Skype: chris.faulkner615) Linux/Unix/Windows Network Engineer BBS Enthusiast group: http://groups.google.com/group/80sbbs --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "NLUG" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/nlug-talk?hl=en -~----------~----~----~----~------~----~------~--~---
