Hi Gert, On 8/20/07, Gert van Maren <[EMAIL PROTECTED]> wrote: > I know it works but performance over the internet is just not really > anything like GE (OSG1.2). Maybe 2.x is faster... maybe it is our web > server...
By GE do you mean Google Earth? Google Earth uses JPEG compression of imagery will helps alot. osgdem by default generates OpenGL compressed textures which results in much much large tiles and poorer paging over the web - but much better performance when loading from a local disk. osgdem as it stands is focused on local disk performance. In the rewrite of VPB I will be adding options to generate databases much more suitable for paging over the web where latency and bandwidth are serious issue. Optimizations will include support for compressed imagery and more compact geometry representations. 1.2 and 2.x will be almost identical in performance w.r.t paging over the web as the format of the database is the same, and the net plugin is largely the same too - these are the things that gate performance. > I saw there was a discussion about speeding up the net plugin about 8 > months ago and the answer was to wait for a complete multi threaded > database pager? Allowing multiple loads to happen at one time would probably help as this would enable multiple connections at once, something that can help improve paging performance. Some of the work that I've done on generalising threading support in the OSG over the past six months will make it more straight forward to add multiple load threads from within the database pager, but I haven't done the final bits to wire up DatabasePager with it yet. The other route is make the net plugin to be more efficient, I have no expertise in this area so will have to defer to others. In the end the solution to better paging over the web performance will come from a combination of better runtime paging/download performance and better database generation tuned for lower bandwidth. Robert. _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
