Concurrent sessions / backup !!

Hello everybody !

I have some confusions about the concurrent backups or jobs per storage or utlity nodes for Avamar 7 & 6 Virtual or physical appliances , I reviewed all avmar documentation , but somehow not clear for me:

Is there difference between Concurrent connections and concurrent backups for Avamar
utility or storage or Grid ?

What is Maximum Concurrent connections per storage node and where to configure it ?

What is Maximum Concurrent connections per utility node , and where to configure it ?

What is Maximum Concurrent backup and restore jobs handled same time per utility node
and OR storage node /or Grid ?

from where I can control the above concurrent sessions ?

I checked#

https://emc--c.na5.visual.force.com/apex/KB_HowTo?id=kA0700000004Nlp

I can see this config file for AVE7 & 6 with little changes for 7:

/usr/local/avamar/var/mc/server_data/prefs/mcserver.xml

but I can not see any correpsonding values for the concurrent sessions as values differes from Avamar documentations.

ANy explanations ?