[OSM-dev] mod_tile

[Grant Slater]

2009/10/27 Viji V Nair <viji at fedoraproject.org>:
> We have a tileserver setup with postgis+mapnick+tilecache using our
> own data set. We are running the tilecache seeder programme to
> pre-cache the tiles. There are a total of 100M tiles.
>
> Is it possible to access these tiles through mod_tile?
>
> Do you have any recommendations for in memory caching, specifically
> distributed caching,  of these type of large small images.
>

mod_tile is a very different stack to tilecache.
apache -> mod_tile -> renderd (part of mod_file package) -> mapnik -> postgis

mod_tile groups tile files together in meta files by default.
Improving performance and reducing inode wastage.

http://wiki.openstreetmap.org/wiki/Servers/yevaud is the primary OSM
mapnik tile server. It currently serves upto 1200 tiles/sec. Higher
figures could be achieved updating tiles less frequently.
Brief of update process: http://wiki.openstreetmap.org/wiki/Minutely_Mapnik

Yevaud stats: http://munin.openstreetmap.org/openstreetmap/yevaud.openstreetmap.html

/ Grant