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Which Amazon EBS volume type is designed for the highest random IOPS at consistent low latency for I/O-intensive databases?
Aio2 / io2 Block Express (Provisioned IOPS SSD)
Bst1 (Throughput-optimised HDD)
Csc1 (Cold HDD)
DStandard (magnetic)
Answer & Solution
Correct answer: A. io2 / io2 Block Express (Provisioned IOPS SSD)
io2/io2 Block Express provisions IOPS independently of capacity and delivers consistent sub-ms latency — ideal for OLTP databases. HDD tiers (st1, sc1, standard) target throughput-streaming or cheap archival.
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