[tor-bugs] #24425 [Core Tor/DirAuth]: Set the hsdir_spread_store parameter to 4 (or maybe even 5)

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#24425: Set the hsdir_spread_store parameter to 4 (or maybe even 5)
-------------------------------------------------+-------------------------
 Reporter:  nickm                                |          Owner:  dgoulet
     Type:  enhancement                          |         Status:
                                                 |  merge_ready
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.2.x-final
Component:  Core Tor/DirAuth                     |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  review-group-27, 031-backport-maybe  |  Actual Points:
Parent ID:                                       |         Points:
 Reviewer:  teor                                 |        Sponsor:
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Comment (by dgoulet):

 Well this parameter was introduced in 032... So basically, the only ones
 affected by this are *services* <= next 032 release.

 We bumped the "store" parameter so now hidden service will store their
 descriptor on 4 * replica HSDir.

 I think we don't have to do more here, -alpha services will simply use 3
 HSDir while the others will use 4, yes the anonymity set is kind of a
 split but also how many v3 services on -alpha out there? And I think it is
 fair to assume that they should go on stable and not stay on -alpha for
 security?

 If we do care about that small subset of v3 service, then we need to ask
 our dirauth to broadcast the new value.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24425#comment:11>
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