[OSM-dev] [PATCH] for mod_tile, adds config file support and support for multiple tile sets

Jon Burgess jburgess777 at googlemail.com
Fri Dec 26 11:46:37 GMT 2008

2008/12/25 Brian Quinion <openstreetmap at brian.quinion.co.uk>:
> Hi,
> The patch is too large for the mailing list, so you can instead
> download it here: http://osm.sjjb.co.uk/mod_tile_ini.diff
> This patch adds various extra options to mod_tile:
> - Support for multiple named mapnik/tile configurations
> - Extra apache directives, e.g.:
>   AddTileConfig /uri/ ConfigName
>   AddTileConfig /osm/ Postcode
>   LoadTileConfig /etc/renderd.conf
> - Config file support (by default /etc/renderd.conf) of the format:
> [Default]
> URI=/osm_tiles2/
> XML=/home/jburgess/osm/svn.openstreetmap.org/applications/rendering/mapnik/osm.xml
> [Postcode]
> URI=/osm/
> XML=/home/jburgess/osm/svn.openstreetmap.org/applications/rendering/mapnik/postcode.xml
> - Changes so mod_tile only effects a specific apache virtual host (the
> one where the Add/LoadTileConfig directive is used)
> - Removed the requirement for the meta tiles directory to be in the
> web root, moved by default to /var/lib/mod_tile/
> As a side effect of these changes the protocol version is moved up to
> 2 and an extra level of hierarchy is introduced into the HASH_PATH for
> the name of the mapnik xml file.  To preserve the existing meta files
> they need to be manually moved to the new folder structure by creating
> a 'Default' folder and moving the files into it.
> I've tested this but could easily have missed something.
> If people are happy with these changes I will happily commit them to
> svn but it's quite a significant change!
> --
>  Brian

The changes look good. Several people have been asking for support of
multiple layers. One problem I notice is:

"hum, this shouldn't bee needed and we'd have to add extra code to do it!"

I'm pretty sure that this is required. mod_tile & renderd can get out
of sync when mod_tile gives up waiting for a tile to render.


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