Hacker News Reader

Nice! Some questions: How much time is needed for the import ? How much disk space should the server have ? (120 GB as in the title?) What do you mean by the 1700 in the phrase "1700 is the GB of RAM" ?

Thanks !

View on HN

> What do you mean by the 1700 in the phrase "1700 is the GB of RAM"

It looks like the 1700 is the Cache size for the command to use in MiB of ram - https://github.com/openstreetmap/osm2pgsql#usage

<cache size> is about 75% of memory in MiB, to a maximum of about 30000. Additional RAM will not be used.

OSM wiki says "XML variant over 666GB uncompressed, 49.1GB bz2 compressed and 31.1GB PBF at 2016-03-20". Not sure where the 120GB comes from.

Maybe because he drops some info from the file (he keeps only the roads) ?

He imports only Europe from geofabrik.de dumps, not whole planet.

A sizable chunk of that is probably database indexes.

Reply on news.ycombinator.com