When we instantiate we give zerovm an executable image (a file) and any other files this executable will need (can be arranged in a sort of "VM image" which is

When we instantiate we give zerovm an executable image (a file) and any other files this executable will need (can be arranged in a sort of "VM image" which is a regular tar file). Sessions (instances) can communicate by unix pipes. Yes we have notion of "instance" it is a running zerovm process. Each session runs in a separate process.