[OpenLayers-Users] More than 20 wms layers, performance issues, geowebcache concurrency

[Andreas Hocevar]

If you use GeoServer with built-in GWC, you can easily do that by
defining group layers in GeoServer.

Andreas.

On Mon, Jul 30, 2012 at 9:40 AM, Sergeant_york
<electronicpanda at gmail.com> wrote:
> Greetings,
>
> Right now I am responsible to add more than 20 wms layers to a map
> application. I cannot group wms layers in the serverside. Therefore I had 2
> solutions as far as I could find.
>
> 1- Adding each layer as one openlayers.layer.wms: The problem is if you add
> 20+ wms layers to a map in openlayers, on the client side I see performance
> issues (Browser uses too much memory and application works too slow). So I
> decided to group the layers clientside...
> 2- Grouping layers clientside: I've grouped 20+ layers to 4-5 layer groups
> with main titles such as "General -> Cities, Streets .. etc). This way
> performance problem dissapeared but this time I realized Geowebcache which
> was integrated to geoserver was not working. Therefore tiles were coming
> from database server directly instead of cached tiles and that was so slow.
> I used "mergeNewParams" method to group layers and to open/close their
> visibility I simply removed layer from "layers" parameter.
>
> So my question is:
>
> I cannot add each layer as openlayers.layer.wms because of clientside
> performance issues; I cannot group layers at clientside like "layers:
> x,y,z...." since it doesn't trigger geowebcache. Is there any other option
> to use to solve clientside performance issue and to be able to obtain tiles
> from geowebcache?
>
>
> Thank you for your answers,
> Best regards
>
>
>
> --
> View this message in context: http://osgeo-org.1560.n6.nabble.com/More-than-20-wms-layers-performance-issues-geowebcache-concurrency-tp4991740.html
> Sent from the OpenLayers Users mailing list archive at Nabble.com.
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-- 
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.