(note this is related to another question which i will post the url to once i submit the question)
I'm writing a application that will eventually have little 'agents' that are running on about 70 computers on a WAN.
Basically, I have a central application that via tcp/ip sends xml commands to these agents, which in turn do 'stuff' based on the xml commands and return a result.
Because the only way i have access to these agents is via a ssh tunnel and vnc, i decided that i really dont want to log onto by opening the tunnel and a vnc session 70 times whenever i need to upgrade the exe. Instead, I have a system where dll's are dynamically loaded based on a config file. the idea being i can just send a xml command (and some binary data) to add new dlls and update the config file so the agent knows how to respond to new xml commands (or to fix any problems in existing dlls).
PROBLEM: In the event that i need to replace the agent exe itself, i need to also do this remotely. How do i replace an exe that is running at the time? I guess the short answer is that I cant, so what is an alternative to upgrade the exe remotely.
NOTE: i cannot use 2 ports, so I cannot have a second applicaiton running always listening on a second port to receive an upgrade to the first exe.
Thanks in advance for your help.