On Thu, Nov 08, 2007 at 04:30:46PM -0700, Bruce Cheney wrote: > Ed, > > I very much appreciate your help. Very insightful. Yes expectations are > 50,000 users at least at the same time.
How often does your data change? You might think about using a tiling client and a tile caching solution on the server if it changes infrequently... TileCache has been known to serve up to a couple hundred requests a second, but that won't provide anywhere near the level of performance you're looking for, I suppose: I've never served more than a steady stream of ~200-300 requests a second with Apache, and that was a pretty unusual circumstance. I recommend you sit down with a single user, have them browse around your site, and track their requests a second. In doing this at MetaCarta, we found that our users using a specific application only generated 1-2 actions every minute -- meaning that with 50,000 users you might be getting down to something sustainable ... I'd personally use OpenLayers and TileCache -- serving up pre-rendered tiles from disk is going to be significantly easier to scale than serving up rendeered data from shapefiles, I think -- but this may just be my lack of experience with serving data fast. Regards, -- Christopher Schmidt MetaCarta
