I have two 5.6 Percona servers in which I'm planning to setup Active master- Passive master replication. Secondary master will be in read-only mode.
Caveat is that the servers in which i'm going to setup is live databases. Master is already running with server-id=1 and it is in place. Secondary master is newly created instance.
Now to backup the production master and copy it to the secondary master, is it mandatory that I need to take backup the live database and then copy it to secondary? Or will it suffice if I take last night's backup?
Also, when I set the Active master to be the slave for secondary, will it impact my production?
I know I need to do this off-live hours but situation demands, hence I wanted to reconfirm before proceeding.
Please highlight on what impact that could do in live database for setting up this replication.