We are planning to migrate VMAX storage systems  from a datacenter at Site-A to Site-C. We have current DR at Site-B. All these sites are interconnected with FCIP connectivity (Async or Adaptive Copy) and more than 600KM apart from each other.  I assume concurrent SRDF from site-A with Site-B and Site-C will save some time and effort but will cause performance impact on production??  Cascaded SRDF will take longer to sync -as we need to wait for Site-B to be synced and consistent before we sync Site-C. But there won't be any performance impact on Prod at site-A.

All VMAX Systems are having Mcode  5875.286.218 and 5876.159.102.

Site-A (Prod) ==(Async)==>Site-B (DR) ==(Async)==>Site-C (Future-Prod)

I would appreciate if you guys can highlight advantages and disadvantages of both methods. I have already been through SRDF product guide.