Hi – We’ve been running M4.2xlarge EC2 instances with 2-3 TB of storage and have been comparing this to I-3.2xlarge, which seems more cost effective when dealing with this amount of storage and from an IOPS perspective. Does anyone have any recommendations/ on the I-3s and how it performs overall, compared to the M4 equivalent? On the surface, without us having taken it through its paces performance-wise, it does seem to be pretty powerful. We just ran through an exercise with a RAIDed 200 TB volume (as opposed to a non RAIDed 3 TB volume) and were seeing a 20-30% improvement with the RAIDed setup, on a 6 node Cassandra ring. Just looking for any feedback/experience folks may have had with the I-3s.
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