why so many ssh processes per node?

[Erik Bryer]

Hello,

When running a job on 16 nodes (2 cores/node), 25 (that I could see) 
simultaneous ssh connections were made to one of the nodes, triggering 
warnings by parallel that the nodes only allow for x simultaneous 
logins, where x is about 20. (From what I've seen it makes this many 
connections to all nodes.) Is it necessary to make so many connections 
per node? Or should I just tweak my MaxStartups in /etc/ssh/sshd_config?

Thanks,

Erik