I'm evaluating costs for a possible migration of a SQL Server that is currently running on Amazon EC2 to Amazon RDS. On the EC2 instance I have six volumes, described as follows:

type size IOPS
gp2 100 GB 300
io1 250 GB 1700
io1 550 GB 1700
gp2 100 GB 300
io1 700 GB 1700
io1 1750 GB 4700

I can't specify the same six volumes on the RDS price calculator. I get just one field for the storage. Regarding the space, easy-peasy, just sum it. But, how about the IOPS? Should I just opt for the largest (4700 in this case), or should I sum all of them?

  • You should sum them together Commented Nov 16, 2021 at 12:42
  • 1
    Are you actually using the full IOPS capacity on all of those disks? That graph shows the capacity, but if you aren't using that capacity, then you don't necessarily need the same capacity once you consolidate it.
    – AMtwo
    Commented Nov 16, 2021 at 15:12


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