Questions on HANA System Replication

Hi All,

I would like to seek your input/advise, if I setup HA=DR (between 2 datacenters) using system replication from PRD (primary) to DEV/QAS (secondary) utilizing shadow operation i.e like the following diagram.

My questions are:

1. Do the HANA System Replication sync. real time?

2. May I know what is the minimum number/minute that I can set to replicate both data disk and log disk from primary host to secondary host?

3. How long do you think the transition period from primary host to secondary host? any chance for un-interrupted/instant takeover? if not, how long do you think it will be?

4. I read once the secondary host takes over the primary, the existing non-prod operation will be ended. is it done automatically or we need to do it manually?

5. How do we switch back again to the primary host (from secondary host)? I'm assuming in here we need to do it via HANA Studio.

Thank you,

Regards,

Ura