[RC5] Active subspaces/random subspaces

Jim C. Nasby nasbjim at charlie.cns.iit.edu
Wed May 6 12:45:00 EDT 1998


The basic reason for this is that the clients are coded to use the
current subspace+1 as the random subspace. It might be more space
efficient to issue out of random keyspaces (ie: switch from 0x64 to 0x65, 
instead of 0x66), but it would also increase the dupe rate durring
switchover periods. Also, redoing random subspaces right now isn't an
option, since that would make a completed subspace the random one, meaning
that almost all randomly generated blocks would be dupes.

Moo!
dB!


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          /^\             Jim C. Nasby (aka Decibel!)
        /     \           nasbjim at charlie.acc.iit.edu
      /----+----\         Freelance lighting designer and database developer
    /      |      \       Member:
   +-------+-------+      Sports Car Club of America, Triangle Fraternity

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On Tue, 5 May 1998, Richard Ellis wrote:

> > Stats on the current status of the subspaces are available at
> > www.distributed.net/statistics/graphs. The odd numbered subspaces
> > are the random ones, and as you can see they are very empty.
> 
> May I ask why, if we can only hold a total of four active subspaces
> on the master key server, that we have two active random subspaces
> open.  Half of the active keys that could be handed out are not being
> handed out because they are allocated to "random" subspaces.  Given
> the present space constraints on the master key server, it would seem
> to make more sense to only have a single active random subspace. 
> This would allow for three quarters of the total available space on
> the master to be allocated to active subspaces, lengthening the time
> between subspace redistributions.
> 
> Rich
> 
> -- 
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> 
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