Michael,
I found in the OSM Wiki the following article.
http://wiki.openstreetmap.org/wiki/PBF_Format
"It is also about 5x faster to write than a gzipped planet and 6x faster to read
than a gzipped planet."
Can anyone say how long do I need to write from database to pbf a country like
Germany? Minutes, Hours, Weeks?
I don't have data for "from database to PBF" scenario. But I regularly
apply (small) changes to my Germany PBF file, the script looks like this:
osmosis --read-replication-interval ./state --simplify-change \
--read-pbf germany.osm.pbf \
--apply-change \
--log-progress \
--write-pbf tmp.germany.osm.pbf omitmetadata=true
and today it said to me on an 64-Bit Ubuntu VM running on two cores of a
Core i7-2600 3,4 GHz with vanilla LVM-virtualized SATA disks:
INFO: Total execution time: 462238 milliseconds.
Currently, the PBF file is about 900MB in size; these 460 seconds also
include the download time for a day's worth of planet file changes, so
the actual PBF reading/writing is even faster.
So it's definitely minutes for Germany, not weeks, given that you have
reasonable hardware ;)
Hope that helps
Igor
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