[OSM-dev] mod_tile / render_list re-renders existing tiles without apparent need

[Jaak Laineste]

Hi,
 I do not have diff update for my osm2pgsql database, just to make
renderd happy I created /var/lib/mod_tile/planet-import-complete file
with yesterdays date and started to prerender tiles with ./render_list
-m default -a -z 0 -Z 10

 But now I noticed that when I rerun the command then it always
re-renders also already existent tiles. How renderd detects whether
tile should be re-rendered, is it only about date of
planet-import-complete file, or something else ? Does it matter if I
tweak layout file?

 I've seen earlier similar issue with live tile rendering -
renderd/mod_tile tries to rerender tiles which are already rendered
and as database is never automatically updated, then I know that tiles
cannot be outdated.

-- 
Jaak