Re: [Tracker] Clues regarding improving performance of tracker-store

[Jonatan Pålsson <jonatan palsson pelagicore com>]

On 12 July 2013 18:27, Adrien Bustany <abustany gnome org> wrote:
> Le 2013-07-12 15:45, Jonatan Pålsson a écrit :
>
> Hi,
>
> one factor is the "depth" of ontologies, ie how many subclasses you have for
> the resources that actually interest you. If you insert a resource of type
> X, and X has 5 superclasses, then you get 5 inserts in SQLite. Matthias has
> been analyzing this in
> http://taschenorakel.de/mathias/2012/04/25/fulltext-search-datastore/ (and
> the previous posts on the same subject, linked from this one). Of course,
> "fixing" that would be an incompatible change with the standard ontologies.
Thanks for the link, it is very interesting reading indeed. Flattened
ontologies does seem like something I would like to try out. I am not
worried about incompatibility regarding existing data, but it would be
a shame to break existing (and future) extractors. I hope it is
possible to design any new ontologies in such a way that support for
the original/full ontologies is a matter of replacing field
identifiers in the SPARQL builders, while keeping the rest of the
extractors intact.



--
Regards,
Jonatan Pålsson

Pelagicore AB
Ekelundsgatan 4, 6th floor, SE-411 18 Gothenburg, Sweden