[metrics-team] How to establish identity on converted descriptors

[Karsten Loesing]

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Hi Thomas,

we briefly talked about identifiers yesterday.  Mind posting the result?

All the best,
Karsten


On 19/06/16 23:01, tl wrote:
> 
>> On 19.06.2016, at 19:30, tl <tl at rat.io> wrote:
>> 
>> We were discussing handling of duplicate descriptors during the
>> last metrics-team IRC chat. Thinking about it I became aware that
>> I’m not always sure how to establish the identity of a descriptor
>> in the first place. It’s easy for descriptors that contain
>> fingerprints (relay, relayExtra, bridge, bridgeExtra). For the
>> other descriptors I could imagine that certain timesamps can
>> serve as identifiers. I guess the type information is always
>> needed as a second part to guarentee uniqueness of the
>> identifier.
>> 
>> relay         type + fingerprint relayExtra    type +
>> fingerprint relayVote     type + published (or valid-after?) 
>> relayCons     type + valid-after bridge        type +
>> fingerprint bridgeExtra   type + fingerprint bridgeStatus  type +
>> published torperf       type + start tordnsel      type +
>> downloaded
>> 
>> Can soemone please comment if this makes sense?
> 
> 
> Okay, I can see for myself that it doesn’t. Relays and bridge
> descriptors additionally need a timestamp to be unique since the
> fingerprint identifies only the router itself, at any point in
> time. OTOH vote  descriptors need an authority identifier.
> 
> relay         type + fingerprint + published relayExtra    type +
> fingerprint + published relayVote     type + identity + published 
> relayConsens  type + valid-after bridge        type + fingerprint +
> published bridgeExtra   type + fingerprint + published bridgeStatus
> type + published torperf       type + start tordnsel      type +
> downloaded
> 
> That’s better but is it good enough? BridgeStatus, Torperf and
> Tordnsel still seem underspecified to me.
> 
> 
> oma _______________________________________________ metrics-team
> mailing list metrics-team at lists.torproject.org 
> https://lists.torproject.org/cgi-bin/mailman/listinfo/metrics-team
> 

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