- :ip_bucket_refill => "6144",
- :net_bucket_refill => "24576",
- :tile_parent => "hsinchu.render.openstreetmap.org"
+ :tile_parent => "hsinchu.render.openstreetmap.org",
+ :tile_siblings => [
+ "balerion.openstreetmap.org",
+ "waima.openstreetmap.org",
+ "tuatara.openstreetmap.org"
+ ]