3 ms·

I guess if they run a 0.001% risk of doing something disastrous then it doesn't cut it. If 0.001% of purchases fail or orders get lost, or they have a few minut

I guess if they run a 0.001% risk of doing something disastrous then it doesn't cut it. If 0.001% of purchases fail or orders get lost, or they have a few minutes of complete downtime, it might not be worth adding another 9. It says something interesting about how think about "high reliability." What it really means is "must never, ever fail" which kind of makes "% reliability" a sort of strange euphemism, I think.

adrianN 10y ago
High reliability means that it is much more likely that something else fails first. We could all be wiped out by a gamma ray burst for example, it makes little sense to make something last longer in expectation than the expected time between two major extinction events.