On Thu, Feb 11, 2010 at 13:46, Kai Krueger <[email protected]> wrote:
>> No i don't think it will. As I said I'd try it from willow but I can
>> imagine, that eg. expiring tiles won't work this easy when osm2pgsql
>> does not run on the same machine as mod_tile.
>
> Expiring tiles is a different matter, but osm2pgsql doesn't expire the
> tiles directly so shouldn't effect where it has to run. Instead it spits
> out a textual list of tiles that should be considered expired, that then
> needs to be handled separately. The actual expiry script will most
> likely need to be run on the same machine as the (meta)tiles stored
> though, as it does require to touch and stat quite a lot of files.
> Especially with the 200 different language styles. But if the meta tile
> directory is writable from the login servers, we can experiment with
> what setup works best first before moving it over to ptolemy.

Note also that osm.org doesn't use osm2pgsql for expiring tiles, they
have a custom script that doesn't look at relations. The reason for it
is that some edits to large relations can expire a lot of tiles IIRC.

I can't recall where the script is but it's some ruby script in OSM SVN.

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