title: HPC: Are launched nodes the clones of interface node?
body: <p>When a SLURM batch job which requests several nodes is submitted, do launched nodes are clones of interface computer? Do they copy everything in interface computer? Here, the interface computer is the one which I ssh to, store files on and submit jobs from.</p>
  
  <p>Especially, in IO context, suppose that I read data from text files named as data_N.dat where N is the process rank. In other words, each process (node) reads its own unique file. When I submit a SLURM job, do all these files get copied to launched nodes? Or nodes read input files line by line from interface computer?</p>