How do I find out if my Magento Instance's Database is being hosted on RDS? I see a RDS instance on AWS, but am not sure how I test without actually stopping the RDS. Wondering if there's a more elegant way to determine.

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First, you could check the database connection string in your app/etc/local.xml file. You might find it in the xml structure inside config > global > resources > default_setup > connection > host. The hostname might be inside a CDATA structure and look like myrdsinstancename.a098420934.ap-zone.rds.amazonaws.com.

Then, check in AWS RDS > Instances > Click on your instance. Search for an attribute called "Endpoint". If this is the same as the one listed in the local.xml file above, then you have found your db instance.

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