On Samstag 15 November 2008, Martijn van Oosterhout wrote: > On Sat, Nov 15, 2008 at 9:49 AM, Keith Ng <[EMAIL PROTECTED]> wrote: > > I am currently uploading fixed coastline from JOSM and I notice that the > > upload is excruciatingly slow. The maximum speech achievable is around > > 1.5KB/s and the average speed is around 800 byles/s. > > > > I am uploading data from Melbourne, Australia. There's nothing wrong with > > my Internet. My maximum upload bandwidth is 256KB/s. Yet, JOSM notifies > > me that my current upload will take around 95 minutes. > > The problem is not speed, it's latency. I'm not sure what your ping > time is to the server (I'm guessing near 350ms), but remember that any > single update done by JOSM will take at least a whole HTTP request to > do which is at least 4*RTT so maybe 1.5 seconds. Multiply by number of > objects... > > The 0.6 API wil have a bulk upload stream which can significantly > reduce the overhead. Another possibility is do a Save in JOSM and you > bulk_upload from a machine closer to the server.
Somtimes working over a local squid helps improving Speed. This way squid might use one http/1.1 request to tunnel all http/1.0 requests over one tcp connection. -- Jörg (Germany, Tettnang) http://www.ostertag.name/ _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk