I have a 3 nodes RS on EC2.
All the nodes are running on r3.2xlarge, which has EBS Optimized turned on.
Recently, AWS released the r4 series, which is described as a better version of r3 - faster memory, better networking, lower costs.
However, the r4 series doesn't have the EBS Optimized option. It does have "12 Gbps of dedicated throughput to EBS".
Is it a good idea to move the nodes to the r4 series or the EBS Optimized option is crucial (and not overcome'd by the dedicated throughput to EBS)?
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