vCenter appliance 6.0 update 2 and SDRS question

Bonjour,

26 hours after a vCenter Appliance upgrade from 6.0 to 6.0 update 2, the vCenter started a complete SDRS storage vMotion for all machines (1164) in all data store clusters. the process was active for 12 hours and was finally completed.

As SDRS uses a 24 hours calculation period:

Question:

1- After an update, do you clear the SDRS calculation/Database?

2- Are there any changes in the vCenter on SDRS calculation method in the update 2?

3- Do we have to expect a complete storage DRS re-organisation after a vCenter upgrade?

Thanks and best regards.

Bernard