[mvapich-discuss] Disable interactive login to compute node

[Satoshi Isono]

Hello Bill, everyone,

Sorry, this issue may not be a MVAPICH article. Please let me have your
opinion on this.

The background is I use MVAPICH based on SSH authorization. And the
number of users is more one thousand. In order to run MPI, I have done
SSH setting. As a result of my configuration, SSH login between compute
nodes does not need password. As we know, this is general setting for
MPI run environment.

On the other hand, anyone who has an account on compute node has done
login for arbitrary nodes. This action is not cared from system security
side. I think we should consider that all users aren't able to login
during other users job running.

My concern is how everyone control such as operations. I know this may
depend on the system policy. On big system site like a TACC, how is this
restricted?

For example, before/after running MPI, to set available user, we are
able to edit password file, automatically?

Best regards,
Satoshi Isono