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Seems a bit naive, saying 2.1PB probably doesn't fit in ram, "but it could"...

I get who this is aimed at, and why, but just saying that it fits in RAM isn't as useful as it could be. This is an opportunity to teach, not just snark.

A bit of clever reformatting of your data and 2.1 Pb could probably easily be reduced in size to something that would fit in RAM. Are you actually needing every byte?

It wasn't intended to snark - I apologize if it was seen that way. I whipped this up super quick and perhaps should have expanded on my meaning.

Like, "To fit 2.1PB in RAM, you could spin up 9 r3.8xlarge EC2 instances for US$3.15 per hour"?

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