On Tue, 2011-03-01 at 10:41 +1300, Robin Paulson wrote: > On 1 March 2011 10:22, Richard Weait <[email protected]> wrote: > > On Mon, Feb 28, 2011 at 4:00 PM, Robin Paulson <[email protected]> > > wrote: > >> we at OSM New Zealand are looking at rendering our own (NZ-only) > >> tiles, and we'd like to get a rough idea of the hardware requirements > >> we will need > >> > >> are there any rules of thumb for how long it would take to render a > >> given lat/lon bbox, using mapnik? > >> > >> i assume lat/lon is the independent variable, although i guess > >> density/complexity of data will affect things as well. > >> > >> disk space, cpu, ram, time would be useful > > > > > > On 1 March 2011 10:22, Richard Weait <[email protected]> wrote: > > It depends. These two metatiles rendered in 18 seconds and 1.5 > > seconds. So it can be all over the place depending. This box is busy > > doing other things too. > > > > http://weait.com:8080/map/shield.html?zoom=6&lat=-41.73199&lon=173.35156&layers=BFF > > > > zooming in to CHCH metatiles were well under a second. > > > > You can get by with a modest box as long as you don't mind waiting and > > have little load. OSM has a monster with 96GB ram and many fast disks > > in RAID. You can probably keep a good size group happy with
The main OSM tile server, Yevaud, is a little more modest than that - 48GB of RAM with 6 fairly fast disks (10k RPM SATA) for the database and tiles: http://wiki.openstreetmap.org/wiki/Servers/yevaud The total disk space used is just over 1TB: 250GB for the DB, 900GB for tiles. > > > > a quad core > > 8 GB ram > > 1 TB of disk > > as high as that! wow, i thought it'd be way lower for ~200MB of > uncompressed data > > we're gonna need a bigger machine Putting exact estimates together is always tricky when you do not know how things will be used but I would say the above is maybe too high for such a small area. Provided you do not attract too many users then I suspect you would get away with only 2 cores, 4GB of RAM and maybe 100GB of disk. To improve the responsiveness you probably want to pre-render all the tiles from zoom 0 through to around zoom 13, 14 or 15. These are the ones which take the longest to render, leaving the higher zooms to render on demand. For a relatively small area it will probably take a couple of days of CPU time to render these. Jon _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
