[tor-dev] Review of Proposal 147: Eliminate the need for v2 directories in generating v3 directories

[Nick Mathewson]

On Wed, Jan 15, 2014 at 9:15 PM, Roger Dingledine <arma at mit.edu> wrote:
> On Wed, Jan 15, 2014 at 01:08:03PM +0100, Karsten Loesing wrote:
>> I talked to Roger on IRC, and here's why this proposal may indeed be
>> overkill:
>>
>> As of January 2013, there is only a single version 3 directory authority
>> left that serves version 2 statuses: dizum.  moria1 and tor26 have been
>> rejecting version 2 requests for a long time, and it's mostly an
>> oversight that dizum still serves them.  The other six authorities have
>> never generated version 2 statuses for others to be used as pre-voting
>> opinions.  So, it's basically not true that version 2 statuses are
>> required for the version 3 protocol to work properly.
>
> See git commits 2e692bd8 and eaf5487d, which went into 0.2.2.12-alpha:
>   o Major bugfixes:
>     - Many relays have been falling out of the consensus lately because
>       not enough authorities know about their descriptor for them to get
>       a majority of votes. When we deprecated the v2 directory protocol,
>       we got rid of the only way that v3 authorities can hear from each
>       other about other descriptors. Now authorities examine every v3
>       vote for new descriptors, and fetch them from that authority. Bugfix
>       on 0.2.1.23.
>
> That was the stopgap that made proposal 147 not so critical. I think
> based on Karsten's recent results that maybe it's enough.

Sounds good to me.

Is this in dir-spec.txt? I'm not finding it at first glance.  If it
isn't, Karsten, would you be able to add it?  Probably we should do
that _after_ merging your dirspec branch.

-- 
Nick