Yes,  Virtual LUN is a manual migration process intended for moving a LUN within a single array.  FAST is an automated process for moving an entire LUN between multiple tiers of storage (SSD, FC, SATA) based on actual workload characteristics, and in comparison to other LUNs on the system.  FASTVP is a more advanced automated process that moves portions of a LUN (as small as 768KB) between multiple tiers of storage (SSD, FC, SATA) based on the workload. This requires pools, but is far more efficient and effective when compared to FAST(nonVP).
both are based RVA technology, and can dynamically move data between protected array's. FAST is automatic process based on defined policy, is Virtual lun a manual process?  I could not straight these out... Thanks!
What are differences btw Virtual LUN, FAST and FAST VP?