[OSM-talk] [OSM-dev] Software development - most pressing issues

[Tom Hughes]

In message <474EE4A0.8070201 at arjam.net>
        Robert Munro <rjmunro at arjam.net> wrote:

> This should be fairly simple:
>
> 1. Figure out how to efficiently apply osmosis changesets to the postgis
> database (probably based on keeping a copy of the OSM database using
> osm2pgsql's database intermediate storage thing, then maybe using
> triggers to pass changes to the postgis geometry tables)
> 2. Figure out which tiles have been changed in the osmosis changeset and
> expunge them from the cache.
> 3. Repeat hourly

You seem to have forgotten to rerender the tiles - just flushing as
bad as it means people will get the "here be dragons" tile until such
time as the tile is rerendered.

The current scheme largely never flushes - it just marks as dirty so
that they are (in due course) rerendered and until then it continues
to serve the old ones as that is better than a "coming soon" tile.

Tom

-- 
Tom Hughes (tom at compton.nu)
http://www.compton.nu/