[Opensim-dev] Global identifiers

[Melanie]

The grid that the object was created on is, by definition,
authoritative. I don't see a way that it can abuse that position. I
do believe that we need to be able to have a display name even if
that provider doesn't exist anymore, and i believe that we need to
minimize remote lookups. I don't want my sims to look up the
identity each time a prim is clicked in build mode. That would be a
ridiculous amount of traffic. Also, see my previous posts.

Also, I believe we need to avoid a central registry at all cost.

Melanie

Dahlia Trimble wrote:
> This looks to me to be an attempt to provide local caching of relevant
> information for reducing lookup requirements and seems a usable approach as
> long as the extra data is known to be non-authoritative. It does bring a
> implementation-specific form into something that has potential to becoming a
> standard of sorts and that may be a concern. It does not appear to address
> the problem of fly-by-night service providers or those who may try to profit
> excessively from a position of providing an authority. Personally I don't
> like the idea of having a paid subscription service having any control over
> my ability to surf the hypergrid, and as such I''d prefer to see the UUID
> portion be the authoritative lookup key and the lookup domain portion be
> considered a suggestion at best. UUIDs by design have sufficient variability
> where collisions are highly unlikely so I don't see collisions as being an
> issue even if they are independently generated by independent providers.
> 
> On Sun, Aug 29, 2010 at 4:44 AM, Melanie <melanie at t-data.com> wrote:
> 
>> We should.
>>
>> Also, we should use extra info in the URI. Reson:
>>
>> http://www.avination.net:8004/user/44626b40-13d6-4817-b61b-de5df7b5e7e8
>>
>> The above is totally meaningless. It can't be used to do anything
>> with unless www.avination.net exists and points to a gatekeeper.
>>
>> However,
>>
>>
>> http://www.avination.net/user/44626b40-13d6-4817-b61b-de5df7b5e7e8/Melanie+Milland
>>
>> makes more sense here.
>>
>> The URI itself provides a "Display name" that the resolver at that
>> URL can treat as extra path info and ignore, if it chooses.
>>
>> This would allow us to create a temporary memory cache record of the
>> UUID -> name mapping that would let us display a prim creator
>> without a lookup, which is a potentially frequent process.
>>
>> The sim can take the URL at face value and diassemble it, using
>> 44626b40-13d6-4817-b61b-de5df7b5e7e8 -> "Melanie
>> Milland at www.avination.net" for the cache and returning that to the
>> viewer as the creator, all without a lookup.
>>
>> While this doesn't prevent verification of stale URI's from failing,
>> it does allow to display a meaningful text if that happens.
>>
>> Melanie
>>
>> diva at metaverseink.com wrote:
>> > Looks like ppl are reading more into this discussion than I intended.
>> >
>> > The hypergrid is up & running with all authentication and security in
>> > place, and so are exchanges of content via HG and archives. What's
>> > missing is *systematic* global identification of resources. OpenSim
>> > already does that internally for resolving *certain* identifiers on the
>> > Hypergrid, but nothing is stored persistently yet. That is going to
>> > change soon, because 1) I want to make friends & IM work across the HG
>> > (so, for example, your foreign friend needs to be identified by a global
>> > ID); and 2) we really need to fix the b0rked "creator" field in
>> OARs/IARs.
>> >
>> > This means that we need to write URIs persistently, both in certain
>> > fields of the DB (which is already prepared for what's coming) and in
>> > the archives.
>> >
>> > So the issue here is really narrow. Assuming everyone agrees that we
>> > should use URIs, should we add type information in the URI or not? Any
>> > other thoughts on the *form* of these URIs?
>> >
>> >
>> > mysticaldemina at xrgrid.com wrote:
>> >> May be good to share what your use case is.  As universal are you
>> suggesting
>> >> an identifier that separate, potentially un-trusted domains, would use
>> to
>> >> identify the same person?
>> >>
>> >> Is so I don't think you can do that with two parties, you need at least
>> one
>> >> more party to validate that they are the same person, like how we do
>> with
>> >> SSL certificates, or with some kind of authentication, like you send me
>> an
>> >> email address which gets me to a profile, but I still need to enter in a
>> >> password or something to get access to that profile.
>> >>
>> >> M.
>> >>
>> >> -----Original Message-----
>> >> From: opensim-dev-bounces at lists.berlios.de
>> >> [mailto:opensim-dev-bounces at lists.berlios.de] On Behalf Of Ai Austin
>> >> Sent: Saturday, August 28, 2010 4:59 PM
>> >> To: opensim-dev at lists.berlios.de
>> >> Subject: Re: [Opensim-dev] Global identifiers
>> >>
>> >> diva wrote:
>> >>> I'm about to introduce global identifiers, so that I can make friends
>> >>> and IM work on the hypergrid, and would like feedback on the best form
>> >>> of these identifiers.
>> >>
>> >>> Here are some options:
>> >>> ... Thoughts?
>> >>
>> >>
>> >> A couple of thoughts and observations Diva...
>> >>
>> >> Could the taxonomy of "types" you use cause problems if the chosen
>> >> 1-1 mapping for a UUID is not felt to work well i future.
>> >>
>> >> "user" is also perhaps a different notion to a specific "avatar"
>> >>
>> >> It would be nice if any UUID in a URI you use can be resolved (e.g.
>> >> to the avatar name) by any host that has the mapping (like the
>> >> distributed nature of DNS works), so its not dependent on the host
>> >> continuing to exist, or to be up at the time information on the
>> >> avatar is sought.
>> >>
>> >> AS an example, we have shifted our data bases between machines and
>> >> have done so 3 or 4 times since we started running OpenSim, carrying
>> >> the UUIDs of avatars (and the UIIDs of regions we use) forwards to
>> >> the new data bases.
>> >>
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