RDS SQL Server backup options
A customer is exploring RDS SQL server. The RDS SQL Server documentation (https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/SQLServer.Procedural.Importing.html) states that “Native backups of RDS databases larger than 1 TB aren't supported.” The question came up asking what backup options are available if a database is larger than 1 TB? We know that restores support up to 16 TB (or presumably 64 TB if we get AWS support to stripe volumes), but curious what is driving the backup limitation?
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1Tb number is not being enforced and not limit actually. It has been empirically determined that backup might take longer than 24 hours on a very small instance. The real limit is 24 hours. If you backup runs around the clock then it will interfere with next day automated backup and will be killed. That's a real limit. 1Tb is derivative of that. So, if you right sized you instance and your backups complete in reasonable amount of time then you can completely ignore 1Tb number.
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