question 1
is the transmission between master and slave databases encrypted? If not, can it be set manually?
question 2
can I configure the master-slave database in this way?
Master database is placed in the cloud, such as Ali; slave database is in the same local local area network (not a fixed public network IP).
question 3
if question 2
can, then, if slave A
changes, can synchronize directly with slave B
after synchronization with master
is completed, that is, direct synchronization between local databases, master
does not participate in