[tor-bugs] #2749 [Tor Hidden Services]: Persistent storage for HSDir descriptors

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#2749: Persistent storage for HSDir descriptors
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 Reporter:  special              |          Owner:  rransom
     Type:  enhancement          |         Status:  new    
 Priority:  normal               |      Milestone:         
Component:  Tor Hidden Services  |        Version:         
 Keywords:                       |         Parent:         
   Points:                       |   Actualpoints:         
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 Store descriptors on HSDir nodes on disk, rather than in memory, so they
 can persist between Tor restarts, and to avoid excessive memory usage if
 the directory becomes large.

 This would also be a good opportunity to evaluate REND_CACHE_MAX_AGE and
 REND_CACHE_MAX_SKEW, which seem to currently keep descriptors for  three
 days.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2749>
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