[OSM-dev] all things to all people
80n80n at gmail.com
Wed Apr 23 09:09:14 BST 2008
2008/4/23 Dirk-Lüder Kreie <osm-list at deelkar.net>:
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> Frederik Ramm schrieb:
> > Hi,
> >> Did I miss something? According to my copy of T at h it's still asking the
> >> main API for data.
> > I could swear I saw a bit of t at h code the other day that was using the
> > XAPI. Possibly that was only the lowzoom part then? - Anyway if you
> > say we don't use the XAPI currently, and if it is really so close
> > behind as 80n says, then why don't we switch?
> XAPI is not optimized for pure bbox requests (yet?), downloading a z12
> city tile takes *quite* some time (order of minutes).
Correct. It is optimised to process [key=value] type predicates. A whole
bbox is processed by passing an implicit [*=*] predicate. I will look at it
sometime to see if complete bbox requests can be optimised better, but for
the moment the main API is quicker for these things.
The fact that it's running off an NFS file system doesn't help either, but
that issue is being investigated separately.
> - --
> Dirk-Lüder "Deelkar" Kreie
> Bremen - 53.0952°N 8.8652°E
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