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> This is an insanely expensive cluster built to show a benchmark. 68 node cluster serving only 15TB storage in total.

This reads to me (and the OP) that you are saying the purpose of this "insanely expensive cluster" was to "show a benchmark."

That's what OP is addressing in his response. No where do you mention anything about performance.

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1TB/second is a benchmark number, and obviously it is trying to impress. This is already a purpose without further clarification, on the other hand it does not necessarily mean it can not have other purpose - which again looks an extremely expensive cluster for that purpose. And I do not see the reason to down vote except some one got hurt in the feeling with a fact. With the actually configuration shown, it is just not that performant nor economical, as I said in the reply, if you had read anything about it.

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