Using mod_tile/renderd I've got OSM up and running with no issues using dynamic tile generation.
That being said, I've been working to pre-render zoom levels 0-16 for another project. I'm a bit confused about some of the results associated with meta-tile count. Pre-rendering tiles seems to work great up until level 15, which is where tiles count discrepancies start to show up. Example of level 14 below where the meta-tile count seems appropriate based on the numbers found here: *http://wiki.openstreetmap.org/wiki/Tile_disk_usage <http://wiki.openstreetmap.org/wiki/Tile_disk_usage>* (Factor of 64 lower due to 8x8 meta-tiles) *Level 14:* render_old -c /usr/local/etc/renderd.conf -n 4 -t /var/lib/mod_tile -z 14 -Z 14 -s /var/run/renderd/renderd.sock -m default Rendering old tiles Planet file updated at Thu Sep 25 21:34:42 2014 Starting 4 rendering threads Waiting for rendering threads to finish Total for all tiles rendered Meta tiles rendered: 0 tiles in 155.28 seconds (0.00 tiles/s) Total tiles rendered: 0 tiles in 155.28 seconds (0.00 tiles/s) Total tiles handled: *4194863* tiles in 155.28 seconds (27014.28 tiles/s) However. once I got to level 15/16 the meta-tile count isn't very believable, see below: *Level 15:* render_old -c /usr/local/etc/renderd.conf -n 4 -t /var/lib/mod_tile -z 15 -Z 15 -s /var/run/renderd/renderd.sock -m default Rendering old tiles Planet file updated at Thu Sep 25 21:34:42 2014 Starting 4 rendering threads Waiting for rendering threads to finish Total for all tiles rendered Meta tiles rendered: 0 tiles in 0.09 seconds (0.00 tiles/s) Total tiles rendered: 0 tiles in 0.09 seconds (0.00 tiles/s) Total tiles handled: *1665* tiles in 0.09 seconds (18520.58 tiles/s) *Level 16:* render_old -c /usr/local/etc/renderd.conf -n 4 -t /var/lib/mod_tile -z 16 -Z 16 -s /var/run/renderd/renderd.sock -m default Rendering old tiles Planet file updated at Thu Sep 25 21:34:42 2014 Starting 4 rendering threads Waiting for rendering threads to finish Total for all tiles rendered Meta tiles rendered: 0 tiles in 0.08 seconds (0.00 tiles/s) Total tiles rendered: 0 tiles in 0.08 seconds (0.00 tiles/s) Total tiles handled: *1065* tiles in 0.08 seconds (14114.00 tiles/s) The thing I don't quite understand is if pre-rendering fails for these levels how is dynamic generation functioning correctly? Based on what I can see there appears to be no missing data at zoom levels 15/16 when viewing the data in an OpenLayers style map. Any insight would be greatly appreciated. I can provide any additional details if needed. -- This e-mail and any files transmitted with it are the property of RGS and are intended solely for the use of the individual or entity to whom this e-mail is addressed. If you are not one of the named recipient(s) or otherwise have reason to believe that you have received this message in error, please notify the sender at 1-970-372-5555 and delete this message immediately from your computer. Any other use, retention, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited. This email is subject to storage and review by RGS LLC. Thanks for your cooperation!
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