Cluster/Supercomputer/HPC variants of Mapserver

[Biz King]

Hi All.

Is anyone aware of anywhere (or better still, has experience of)  
running Mapserver via an MPI/Grid interface or as a cluster?

We're trying to develop a high-performance mapserver that can cope  
with the load we're going to be throwing at it!  Currently it takes  
298 seconds (on a Mac OSX Server, 3.5 Gb Ram, dual 2Ghz processors)  
to do what we need done on under 60 seconds!  There's not much we can  
do to cut down the load as we're creating a whole series of nodes on  
a layer via a database and we're then creating the imagery based on  
these items and outputting them to graphics formats in varying sizes.

The results get fed to users on demand without the delays associated  
with 'on the fly' image creation.

Any help will be welcomed!

cheers

Biz