[OSM-dev] osm2pgsql not appending changeset?

[Kai Krueger]

Ákos Maróy wrote
> 
> on the OSM wiki, I found a number of update options, and I have to say
> I'm a bit confused. which is the best option if I want to get all the
> updates for the whole planet file, say, each week?
> 
If you are intending to only update the diffs every week or less (as opposed
to minutely, hourly or daily), you might want to consider simply doing a
fresh import every week. If you have sufficient ram, then you can use the
non-slim mode, otherwise you could consider the slim mode with the --drop
option. Both are considerably faster than the normal slim mode import.

Applying diffs with osm2pgsql is orders of magnitude slower per element than
the initial import. Which makes a full import faster even for moderately
short periods of diff application. Where the change-over lies exactly,
probably depends somewhat on the hardware, but applying a weeks diffs will
probably take a few days.

Kai


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