[osmosis-dev] Inquiries about "Minutely Mapnik"

[Peter Körner]

Maxime Petazzoni schrieb:
> From your experience, can you confirm that this would be the case, and
> that applying minute diffs won't take longer than a minute, or hourly
> diffs longer than an hour (otherwise it would be impossible to stay
> up-to-date with the database and we would start falling behind)?
At the wikimedia toolserver it takes <10s to import a minutely diff. 
Excluding errors we keep our database at a replication lag of <120s at 
all times.

> The "Minutely Mapnik" wiki page on the OSM wiki
> (http://wiki.openstreetmap.org/wiki/Minutely_Mapnik) seems to be a good
> starting point to get this new technique of keeping our database updated
> going.
You might want to take a look at
http://svn.toolserver.org/svnroot/mazder/diff-import/load-next and
http://svn.toolserver.org/svnroot/mazder/diff-import/replag

those are the scripts that run on the wikimedia servers.

 > But I would like to try it first on my machine. Importing the
> full planet.osm file would take forever though, so I'd like to try this
> on a single country. Is it possible to use the osmosis replication data
> on a subset of the planet?
That's not as easy and has been discussed on osm-dev some weeks ago.

Peter