Thanks for your reply! 🙂

It is exactly what you understood! By using merge replication, I think we need to configure 15 servers as subscriber. This way there will be problem for startup snapshots and later re-initialization if required.

For startup snapshot, central server is empty and has nothing to send as snapshot to subscribers. Each subscriber must send the initial data to publisher(how!? SSIS? Linked server?).

If in the future we need to re-initialize particular subscriber, all data related to that subscriber(partition) must be deleted at publisher, and send data from subscriber and re-establish replication.

What can be good solution?

Thanks again!