Conduct performance and reliability studies. The Condor approach may have difficulties. They grab an open call, and then remap it to an rpc. This means we may have namespace collision problems on some machines. Paradyn may work on some machines.
Condor grabs all systems calls and performs an RPC to a server running on the host machine.
There is no local caching of files. The UFO system intercepts open, close, and fork system calls via the proc filesystem. Currently, it runs only on Solaris, but Irix also has a proc filesystem, so it might work there. Like gass, it does a copy in on open, and copy out on close. It runs entirely in user space.