Synchronizing a RDS instance with another RDS instance

Question

I have a database on an RDS Instance (master) that needs to be synchronized to another RDS instance (slave). I created a read-replica for the first one, but that is created as read_only so I cannot do any operations on it.

Basically, I'll need to create a few other databases on the slave instance as well so that needs to be non-read-only. I'll also need to setup sync to happen once daily.

I am using MySQL 5.6+.

Answer 1

DISCLAIMER : I haven't tried this myself

What you asking for is somewhat rare. Nevertheless, it is possible.

Here is a link to Looker.com to explain how.

Basically, you do the following:

• Create a read replica
• Create a Custom DB Parameter group
• Tweak the read_only setting in the Custom DB Parameter Group
• When replica has been created, ...
  • you modify the instance
  • set Parameter Group to the Custom DB Parameter Group

Once you have the accessibility, you can create the DBs directly in the Slave.

I would normally say "Give it a Try !!!" but I never did this before. So, try it out and tell us all if it worked.