I did install the sample. When the size is 10, I don't see any unreachable nodes. but when I go to a larger cluster (which I need, and I have 300 available nodes), I see about 10%-20% unreachable nodes.
Anyhow, problems 2 and 3 still exist on a small HPC cluster.
Thank you very much. with this problem, I'm not using 10%-20% of my 300 nodes. At first (when I didn't have this many nodes), I assumed it's by design (to reserver a few nodes), but when I looked closer, I found out they are unreachable.
What is interesting for me was the inability to use Any HpCNode cmdlets such as:
Actually I'll go ahead and list all available *Hpc* cmdlets as a reply to the main question.