We are currently running our database in RDS – just one master (no read slaves), with a Multi-AZ deployment for fail-over durability.
I am contemplating some performance tweaks, one of which is disabling binary logs. I know they're used for master->slave replication, but I am not sure whether Amazon uses the same mechanism to support its Multi-AZ set-up or not.
I don't want to accidentally break the Multi-AZ feature by disabling binary logs.
Best Answer
Yes it does uses mysql binary logs for Multi-AZ replication.
Here this FAQ at amazon site confirms this:
http://aws.amazon.com/rds/faqs/#103
And this one too.
http://aws.amazon.com/rds/faqs/#107
This simply confirms that it does uses binary logs.