Chris, 

there are a few things you can do using the geowebcache.xml:

in the 
<wmsLayer> tag

usual tags such as name/title/mimeFormats/gridsets/ 

<wmsUrl>        <string>http://my_geowebcache_server/</string> </wmsUrl> 

You cannot leave the wmsURL tag out BUT .. 


O.k. that is a bit harsh, I admit

but also:
<expireCache>0</expireCache>   

or scale level-specific <expireCacheList>-2</expireCacheList>

 and 
<cacheBypassAllowed>false</cacheBypassAllowed>

</wmsLayer>

In geoserver I don't know what happens if you set the cache to 0.
But you could also (again a rather radical means) disable the database.

In the web.xml:
<context-param>
    <param-name>GWC_METASTORE_DISABLED</param-name>
    <param-value>TRUE</param-value>
  </context-param>
 
You might do the seceond one as well as your cache will stay the same size. 
  <context-param>
    <param-name>GWC_DISKQUOTA_DISABLED</param-name>
    <param-value>TRUE</param-value>
  </context-param>
No database hence no clue when to expire. They work in geoserver too as you
get the message:
"Disk Quota has been disabled through the GWC_DISKQUOTA_DISABLED=true
environment variable/servlet context parameter/JVM argument, so this
configuration page is not operational."

Again this is also a rather radical measure.


Cheers

Christian



-----
____________________________

Dr Christian Maul
Project Manager

Information Services Branch
Department of Sustainability and Environment
Level13, Marland House, 570 Bourke Street
Melbourne 3000

PO Box 500, East Melbourne Vic 3002


Telephone:        +61-3-8636 2325
Telefax:              +61-3-8636 2813
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