Hi, Milo. :)
Using Mapserver as a WMS server, it doesn't touch the temp directory.
That's normal. The mapserv binary doesn't offer a way to force the image
to be dumped to disk, nor will it look for a previous identical request
and reuse the image.
If you want generated images to be cached, have you considered using
TileCache? It does exactly what you want, I think: it acts as a WMS
proxy, saves the "tile" to disk, and will regurgitate that same tile
later. I use TileCache extensively on a few projects, and it is a
miracle for situations where the WMS requests are very expensive.
--
Gregor Mosheh / Greg Allensworth
System Administrator, HostGIS cartographic development & hosting services
http://www.HostGIS.com/
"Remember that no one cares if you can back up,
only if you can restore." - AMANDA
