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Power efficiency (lemmy.zip)

submitted 6 hours ago by jobbies@lemmy.zip to c/selfhosted@lemmy.world

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I'm wondering what folks do to optimise the power efficiency of their Linux servers. I've never really got to the bottom of what is the best way to do this and with the current energy crisis its a pertinent topic.

I'm talking about home servers, so the availability requirements are not the same as in a corporate environment. There might be vast chunks of time during the day or night when they sit idle, and home users are more tolerant of a lag when accessing resources if it means lower energy bills.

Specifically I've been thinking about:

allowing lower power states when idle
spinning-down hdd's when they're not in use
MAYBE letting machines sleep/hibernate
setting schedules of times where you know demand will be low/zero and efficiency can be managed aggressively
any other quick wins I've missed

It would be amazing if there was one tool or one guide that helps with all of that but thats never the case, is it 😅

Thoughts?

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[–] hendrik@palaver.p3x.de 5 points 4 hours ago* (last edited 4 hours ago)

I got a power-efficient mainboard and PSU. I think that'll be the lion's share. And I don't have any unnecessary stuff like a GPU or extra stuff connected.

I ran powertop and adopted the recommendations to set the various buses, peripherals and devices into powersave mode. That does a few Watts here and there. CPU of course is also allowed to save power when idle.

And then I made the harddisks spin down after 40min of not being used. Or something like that. So they'll automatically spin down at night and when I'm not using them. As spinning hdds consume quite a lot of power if you have multiple of them and compare it to the 15-20W or so the rest of the computer uses. The operating system is on a SSD.