On Mon, Feb 28, 2011 at 11:18 PM, Sjoerd Brandsma <[email protected]>wrote:

> Hi,
>
> Unfortunatly I cannot move to a linux platform because this machine is
> also used for Microsoft .net WCF webservices.
> Erdas Appollo 2011 runs on the same machine so that should be an equal
> comparison. Both go through IIS and AJP13
> ECW data is on a raid 5 configuration with 'default'  5400 rpm 2.5"
> disks (6x 500GB disk in a 1U server)
>
> Advantage of Apollo 2011 (with JBoss) is that it seems to use 64bit
> native ECW dll's.
> I couldn't manage to get Geoserver working with 64bit jdk,  GDAL,
> 64bit jai and ECW support so that's all 32bit.
>

Yes, if you want to go 64 bits the only supported platform is Linux
(theoretically Solaris too, but I'm not sure there is imageio-ext support
for
 that platform).


> In this case it should not really matter I guess..
> Apollo seems to perform better then Geoserver when more concurrent
> users are defined than there are tomcat/geoserver instances.
>
> Some test with JMeter (6 concurrent users, 300 samples taken) results so
> far:
> Geoserver: Random JPG WMS requests of 800x800 pixels (with 6 geoserver
> instances) take on average 1400msec
> Apollo 2011: Random JPG WMS requests of 800x800 pixels take on average
> 1100msec
>
> I followed most of the rules described here:
> http://docs.geoserver.org/latest/en/user/production/index.html
> Are there any suggested settings for JAI, WCS, WMS (Max rendering
> memory, etc) and Coverage Access Settings?
>

In the coverage definition itself, try disabling the use of imageio readers
and
use smaller tiling hints, something like 32,32, both should help

We also have a number of ideas on how to improve raster scalability further,
none of them quick to implement though, so we're waiting for someone to
sponsor their implementation.

Cheers
Andrea


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