I think a lot of payment terminals have an option to record transactions offline and upload them later, but apparently it's not enabled by default - probably because it increases your risk that someone pays with a bad card.
After having my credit card locked by stupid fraud prevention algorithms on my honeymoon, I had a long chat with them before going overseas a second time.
And that was the day Visa had a full on outage. We would walk into one shop, try to buy stuff, get declined, then go into the next and get accepted because they were running in offline mode.
Got a nice big bill from my cellphone carrier for making the call to visa to ask them wtf as well.
Why are yours changing every day? If they always did that, then yes it would be a stupid idea. But they don't change on their own, or for no reason, so it isn't a stupid idea.
Mine change maybe once every couple of years, if I do a full reinstall without copying over the old host key. And then I know exactly why it changed.
the only time the host keys should change is if you a) delete them (either by wiping the whole machine or just deleting the files), or b) explicitly regenerate them. If they're changing for any other reason you're doing something weird.
A system upgrade reinstalls every package, but does not regenerate host keys (Fedora).
A full reinstall is wiping the drive completely, and running the installer from a LiveCD/LiveUSB. Nothing is retained, and new host keys are generated.
If my host keys were changing regularly, I would worry about it. There's no legitimate reason for that to be happening, since I'm not regularly wiping the drive and reinstalling, nor am I regularly manually deleting the host keys (the other way they get regenerated).
I'm able to subtract 8, but if I'm scanning logs it's one more thing to process.
If it's local time I know instantly when something happened, without having to do mental math.
Is there anything wrong with ISO8601 (including timezone offset) for storing times? They're in my local time, but they can be accurately converted to any other timezone.
No problem as long as it's all local, but it's a big annoyance to the other teams if I'm trying to coordinate with the West US team who're on PT, the East coast on ET, Europe on CET, India on IST, Australia on BBQ...
It's just easier for everyone if we agree on UTC and everyone knows their own offset.
Aren't those that want to work, already working? And those that don't want to work but are doing the bare minimum to keep their job are still accomplishing something.
So only keeping the motivated people would make net production go down, I'd think.
I feel like I don't really like AWS and prefer self hosted vps or even google cloud / cloudflare more but and so I agree with what you are trying to say but Let me be the devil's argument.
I mean I agree but what you are saying is that where else are you gonna host it? If you host it yourself and then it turns out to be an issue and you go down then that's entirely on you and 99% of the internet still works.
But if Aws goes down, lets say 50% of the internet goes down.
So, in essence, nobody blames a particular team/person just as the parent comment said that nobody gets fired for picking IBM.
Although, I still think that the idea which is worrying is such massive centralization of servers that we have a single switch which can turn half the internet off. So I am a bit worried from the centralization side of thing's.
It was pretty frustrating to me when multiple services weren't working during the outage. I'm an end user; I don't use AWS, nor do I work on anything using AWS.
From my perspective, multiple unrelated websites quit working at the same time. I would rather have had one website down, and the rest working, than for me to be completely hamstrung because so many services are down simultaneously.
Watts work fine for AC - multiply your RMS voltage by current. The RMS takes care of the fact that AC isn't steady like DC.
VA (takes power factor into account) is relevant for sizing transformers, breakers, wiring, etc but usually only affects your bill if you are a large industrial customer.
That is just what I said: that is the formula for VA, not P, even though both have the same dimensional units: https://en.wikipedia.org/wiki/Volt-ampere and https://en.wikipedia.org/wiki/AC_power#Apparent_power. And they'd be roughly the same for something like a toaster, but if you happen to be interested in, say, the billed power consumption of a 30 year old fridge with a motor
Can't edit any more, but yes I see your point now, and my earlier comment was wrong; you can't get the watts of an AC device by multiplying RMS voltage and current. That will indeed give you VA. Watts = VA * power factor, to get real power. VA is always apparent power.
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