[tor-bugs] #11743 [Tor]: nodelist_add_microdesc: assign md to all appropriate nodes properly

Tor Bug Tracker & Wiki blackhole at torproject.org
Mon May 5 16:10:45 UTC 2014


#11743: nodelist_add_microdesc: assign md to all appropriate nodes properly
-----------------------------+--------------------------------------
     Reporter:  cypherpunks  |      Owner:
         Type:  defect       |     Status:  new
     Priority:  major        |  Milestone:  Tor: 0.2.5.x-final
    Component:  Tor          |    Version:
   Resolution:               |   Keywords:  tor-relay needs-proposal
Actual Points:               |  Parent ID:
       Points:               |
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Comment (by nickm):

 Replying to [comment:6 nickm]:
 >
 > Uncompressed microdescriptors get 7% longer. Compressed microdescriptors
 get around 12% longer. This shouldn't matter even ''that'' much if we are
 right that microdescriptors change infrequently, and consensuses dominate
 the amount of stuff we download.  We can get it back down to 0% later on
 when we implement proposal 228.

 Those numbers assume that we include 160-bit identity digests in
 microdescriptors.  If we're feeling cheeky, and we decided to include a
 128-bit truncated digest, the uncompressed and compressed overheads are
 6.7% and 10% respectively.  If we dropped to 80 bits, we'd add 5% and 7%
 respectively, but I should never pay attention to the "80 bits are enough"
 voice again.

 (All these numbers were obtained by adding random id lines to all the
 microdescriptors in my cached-microdescriptors file)

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/11743#comment:7>
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