I’m a bit disappointed the article doesn’t mention Aerospike. It’s not a rdbms but a kvdb commonly used in adtech, and extremely performant on that use case. Anyway, it’s actually designed for ssds, which makes it possible to persist all writes even when the nic is saturated with write operations. Of course the aggregated bandwidth of the attached ssd hardware needs to be faster than the throughput of the nic, but not much, there’s very little overhead in the software.