Yeah, the case you describe is very similar to the one for which this feature was written. And now I do see you said it in one of the follow ups I obviously missed, sorry.
That is the only way forward that I can think of. And tell all of the providers to switch to clusters of GeoServers for increased reliability and decreased costs ;) -Arne On 9/14/12 06:52 , Christian Höhener wrote: > > Hi Arne > > The reason is that we collect WMS from different providers. The idea > with caching is, that we have a "copy" of the data in our cache - und > can serve our system with this, when one of the "source WMS" of which > we haven't any control, isn't working. > > I'm not sure if this is really possible? > > The other idea was to collect "all tiles" of the "source WMS", save > them as png locally and use them this way. I think this is quite > exactly what geowebcache is doing. > > If I'm completely wrong - I'm happy for any advice. > > Thank you. > > Christian > > --------- > > I've read the followups, but it is stilll unclear to me why you are > invoking GWC at all ? > > GWC stores many small tiles in PNG or JPEG format. It is rather > expensive to decode these tiles and to combine them into a new image. > > Last time I checked it was a lot slower than using an optimized > GeoTIFF as the source, and I think (but I haven't checked) you need a > pretty hefty dataset + styles for this to be slower than rendering > vector straight from the database. > > So why not just use WMS ?The ability to combine tiles was written for > a very extreme case, a legacy WMS backend that was unbearably slow and > couldn't be fixed. > > -Arne > > > > -- > -------------------------------- > Christian Höhener > Demutstrasse 21 > 9000 St.Gallen > Tel. 071 534 80 04 > Mobile. 079 417 38 53 > -------------------------------- ------------------------------------------------------------------------------ Got visibility? Most devs has no idea what their production app looks like. Find out how fast your code is with AppDynamics Lite. http://ad.doubleclick.net/clk;262219671;13503038;y? http://info.appdynamics.com/FreeJavaPerformanceDownload.html _______________________________________________ Geoserver-users mailing list Geoserver-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-users
