3 ms·
Really? You'd think at Amazon's scale an additional PSU in a 1U custom-built server (I assume they're custom) would be a few tens of $ at most. Actually, now t
by ItsBob 5y ago
Really? You'd think at Amazon's scale an additional PSU in a 1U custom-built server (I assume they're custom) would be a few tens of $ at most.
Actually, now that I type that it makes sense. Scaling a few tens of dollars to a bajillion servers on the off-chance that you get an inbound power failure (quite rare I'd reckon) might cost more than what they'd lose if it does actually fail.
So yeah, they're potentially just balancing the risk here and minimising cost on the hardware.
Edit: changed grammar a bit.
- deleted 5y ago[deleted]
- vel0city 5y agoAt big cloud provider scale like Amazon, Azure, and Google they probably aren't even running PSUs at each server, they're probably doing DC at the rack these days. No point in having a million little transformers everywhere, far easier maintenance centralizing those and have multiple feeding the bus bars going to each rack.
- rainbowzootsuit 5y agoThe ones Im seeing designed have been moving the DC out to the cabinets with A/B 480VAC power feeds on the bus, and integrated DC inverters/rectifiers/batteries at the rack level. More modular and a lot less copper at 10x the voltage. Still a lot of copper.