[Telepathy] Folks status, the addressbook problem

[Philip Withnall]

On Fri, 2012-11-02 at 09:14 -0700, Travis Reitter wrote:
> On Fri, 2012-11-02 at 09:52 +0100, Xavier Claessens wrote:
> > Le jeudi 01 novembre 2012 à 14:24 -0700, Travis Reitter a écrit :
> > > On Thu, 2012-11-01 at 21:19 +0000, Philip Withnall wrote:
> > > 
> > > > Are you thinking of Tpf.Persona.dup_for_contact()? It takes a TpContact
> > > > and spits out a Tpf.Persona. From the Tpf.Persona, you can get a
> > > > Folks.Individual from its ‘individual’ property.
> > > 
> > > No, I meant a general any Persona -> their Individual. It's also
> > > possible that it was something like Persona.uid -> their Individual.
> > 
> > Afaik you can do that only if you loaded the full aggregator. Which is
> > IMHO not something we want to do in half a dozen processes.
> 
> Right. That would be true in any case though - even if we cached all the
> links in some special DB (it would just load much more quickly).

Agreed.

> Maybe a link cache is one of the things we need. In the common case, any
*snip*

All sounds pretty similar to thoughts I’ve had. A cache should speed
initial aggregation up, but it can imagine lots of corner-case bugs
where the cache gets into a stale state.

> Even farther in the future, we might be able to come up with a heuristic
> that lets us refresh the Individuals (and their Personas) who are most
> likely to have changed since we last wrote out the cache. I can hear
> Philip cringing audibly already.

I think that kind of work should only be done after all the low-hanging
fruit has been picked by the cache, and then after a lot more profiling
work.

Philip

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