VLUN migration

Hello,

I am looking for indepth concepts of VLUN migration, Could you any posts links related to it.

Some of the questions i have how much amount of resources each  migration session utilizes like, Cache utilization, BE ports utilization, How many BE ports get involved ?  We are planning to do VLUN migration for storage group with 5 * 5TB luns. If create session with storage group is there any performance difference on VMAX, compare to initiating one LUN at a time ?

One of the reason for the questions because the VMAX is on heavily utilized, like most of the BE ports are always at 60 to 70% busy. I wanted to make sure the impacts of initiating the multiple sessions vs one session. and also is it safe to initiate VLUN migration at any time or in off hours alone.  last but not least How much time it takes for TB lun to complete the migration process to plan the schedules

Thank you in advance for help.