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bikelangyesterday at 4:05 PM1 replyview on HN

Curious to learn more here - why would altitude play a role here? And when you say high altitude - are we talking La Paz, Bolivia (~12k feet) or Denver, CO (~5k feet)?


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dsr_yesterday at 4:16 PM

The primary source of uncorrelated bit-flips is, effectively, cosmic radiation.

(Correlated bit-flips are likely from a manufacturing error... or, at least in one case, from excessively radioactive ceramic packaging.)

The more atmosphere you have to randomly absorb high-energy photons, the better.

Higher density memory drops fewer electrons in each well, which means a lower-energy photon can change the state.

Corolary: submarine datacenters are much better than orbital datacenters. Cheaper to cool, construct, shield and access.

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