@Mugurs - If you copy/paste the full paragraph from the results of your performance assessment we can help break down what they were referring to in your situation... however, with out a doubt, it is BEST practice to zone a single host to both nodes in a pair, if you want 2 paths, it goes to 1 node pair... if you want 4 paths, and have 4 nodes, you should use 2 node pairs (4 nodes) to keep all 4 nodes evenly balanced.
mugurs wrote:
@giladzzz
We got some kind of a performance assessment on one of our V800 3.1.2MU2 and among other things 3PAR guys told us there were the following words:"Host balance is wrong, hosts should be in different node-pairs. This is mandatory and stated in the 3PAR best practices. HOSTS should not be in the same node-pair but in different node-pairs".