We have backup configured in such a way that Full backup with long retention will go to a SLP1 ( suppose storage unit X) and differential backup will go to another SLP2 ( storage unit Y). My question is will this cause any performance issue? As lately we are seeing backups moving very slow in our environment so wanted to check on this point.
Thanks in advance.
by itself - no. performance issues are not due to the SLP.
You need to look at the loads on the Storage units, X & Y - what else is there? If there was nothing on else but this on X, but Y is really busy, You will see slow down if you move to Y.