I'm currently working on a map project, based on OpenStreetMap, using Mapnik, renderd and mod_tile (like osm do on their website). I've built an osm tiles server, following some tutorials, on my personal computer (Ubuntu 12.04). It works well, and i've loaded a lot of regions of one country (not the entire planet, just some piece of the planet).
I realized that mod_tile was using a cache for each tiles rendered, so i decided to investigate how i can clear that.
The only solution i found so far was to use the render_expired binary, but i don't understand how i can set all tiles to expired by this way (moreover without diff files)...
I was trying to find where these images are located but i don't find them.
I need some help, so if someone has an idea ...
Just remove the mentioned /var/lib/mod_tile/default (using rm -rf if you dare) and restart renderd daemon.