[jacquesm]

> I basically don't believing people when they claim to do significantly better than Amazon (or another favorite cloud provider) for infrastructure uptime.

That needs a dollar-for-dollar or something to that effect qualification. It's possible but very expensive.

There are for instance long running (and I mean really long running, many years or even decades) experiments where any amount of downtime would cause a do-over.

One of my customers had something like this on the go. The amount of money they spent on their power and network redundancy was off the scale, but they definitely had better uptime than Amazon.

Their problems were more along the lines of 'this piece of equipment is nearly eol, how do we replace it without interrupting the work it does'.

[dpark]

Yes, sorry. I was assuming similar expense. Enough money can buy just about anything, including a few additional nines.

If your goal is to build out scale more reliably than Amazon, at the same or lower cost, that's tough and you're unlikely to achieve it unless your scale is approaching that of Amazon (and you have really good people).