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Making a Linux home server sleep on idle and wake on demand – the simple way

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Re: Making a Linux home server sleep on idle and wake on demand – the simple way

#231

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Re: Making a Linux home server sleep on idle and wake on demand – the simple way

#232

Post by hammyhavoc »

gertlex wrote: post #162
DCKing wrote: post #33

This looks like one of those home server infrastructure setup rabbit holes I would've bailed out of within the first 10 minutes of Googling to research the problem. I commend the author for their perseverance and the writeup - rabbit hole writeups are their own form of entertainment. That alone was worth it. I could never run anything that looks like such a conceptual pain the butt. A pain to maintain and troubleshoo…

> This looks like one of those home server infrastructure setup rabbit holes I would've bailed out of within the first 10 minutes of Googling to research the problem. Absolutely have felt the same often, in the past. Good news! There's ChatGPT now! It's so much quicker than google for figuring out approaches; it's great for explaining concepts and "how to do x with tech". And it's great at writing the scripts for you…

ChatGPT can't even do sensible NGINX configs, despite feeding it documentation. Gets URL rewrites wrong et al, hallucinates things that aren't even there. Troubleshooting its output is more labour-intensive than just doing it right in the first place, but most folks' Dunning-Kruger complex prevents them from knowing when the output is wrong in the first place.

Re: Making a Linux home server sleep on idle and wake on demand – the simple way

#233

Post by tfvlrue »

MayeulC wrote: post #151
tfvlrue wrote: post #125

Earlier quoted context omitted.

Probably a lot. My anecdata: I have had four Seagate HDDs in my desktop PC since 2007 and despite a couple of remapped sectors, they're still working fine. I often power it on and off 1-2 times a day, and the drives are set to spin down when not in use. The SMART data for these drives shows approximately 37,000 power on hours and 17,000 start/stop cycles. That's about 4 years 3 months of actual power on time, and abo…

You probably meant 3 power cycles a day. What is your spin-down time? I use the following on my server's fstab: UUID="abcd" /data btrfs defaults,noauto,compress=zstd,x-systemd.automount,x-systemd.mount-timeout=1min,x-systemd.idle-timeout=30min

Oops. Yes, an average of 3 cycles per day, not per year!

I have the spin down timeout set to 20 minutes. But this is a desktop PC with intermittent usage (and different usage patterns over the years). They used to be in a RAID1+0 but now they're JBOD and I use them as scratch drives for random stuff.

Re: Making a Linux home server sleep on idle and wake on demand – the simple way

#234

Post by tfvlrue »

usr1106 wrote: post #134
tfvlrue wrote: post #125

Earlier quoted context omitted.

Probably a lot. My anecdata: I have had four Seagate HDDs in my desktop PC since 2007 and despite a couple of remapped sectors, they're still working fine. I often power it on and off 1-2 times a day, and the drives are set to spin down when not in use. The SMART data for these drives shows approximately 37,000 power on hours and 17,000 start/stop cycles. That's about 4 years 3 months of actual power on time, and abo…

That might possibly be close where you live, but not where I live. I need to heat my home at least 8 months a year and I heat using electricity (which isn't the smartest thing to do, but that's the way the house was built 30 years ago). It is too hot inside less than 4 weeks a year. So saving energy is done by trying to live in cooler rooms, but not by searching for small consumers.

I'm curious if you mean the 15 cents per kwh estimate is too high or too low? It's a conservative average for me in upstate NY over the past ~15 years.

If you're using electric resistance heat, then I suppose a running computer is kind of like processing power plus "free" heat :)

Re: Making a Linux home server sleep on idle and wake on demand – the simple way

#235

Post by monocasa »

gertlex wrote: post #184
monocasa wrote: post #164

Earlier quoted context omitted.

So far my experience has been the opposite with ChapGPT FWIW. Overall it has cost me more time sending me down rabbit holes that it totally made up, but said with absolute confidence.

This is interesting to hear! A key caveat in much of what I'm doing, is I'm implementing things I previously did for other projects in the past 15 years... so I'm using old technology, know the terminology, and can troubleshoot 90% correct stuff that chatGPT gives me. I haven't done as much "I have no idea where to start" stuff.

I came at it too from a 'I've done this for more than a decade' perspective as well. I simply found that it's advice was already something I knew, or outright wrong, or wrong but very convincing that it could work.

Re: Making a Linux home server sleep on idle and wake on demand – the simple way

#236

Post by otterpro »

I have servers that I don't want to run 24/7 but I still need to access them from time to time. My current solution was to schedule shutdown of all the servers between 12am - 6am (usingcron) and start them up at 6am (using BIOS scheduled power-on), to save on electricity cost since no one uses them during those hours. However, this is much elegant solution.

Re: Making a Linux home server sleep on idle and wake on demand – the simple way

#237

Post by hulitu »

gambiting wrote: post #192
hulitu wrote: post #181

Earlier quoted context omitted.

> A Raspberry Pi that itself would work just as fine as the Time Machine server the author seems to need on demand? A Raspberry Pi has one big problem: no SATA ports.

Yes but RPI 4 has usb 3.0 ports that you'd really struggle to saturate with a gigabit connection - I used to see the lack of sata as a major problem with that platform but nowadays it really doesn't matter.

AFAIK the USB ports on RPi are shared with other peripherals. And there is no way you can connect more than 2 SATA drives without additional HW .

Re: Making a Linux home server sleep on idle and wake on demand – the simple way

#238

Post by mkopec »

Interesting. I believe with runtime (opportunistic) S0ix on x86 we'd be able to get similarly low power consumption at idle, but that would require cooperation from all devices and system firmware. It's already a thing on laptops, where if certain conditions are met, the laptop can technically be "sleeping" when the screen is displaying static content, like a document.

Re: Making a Linux home server sleep on idle and wake on demand – the simple way

#239

Post by gambiting »

hulitu wrote: post #237
gambiting wrote: post #192

Earlier quoted context omitted.

Yes but RPI 4 has usb 3.0 ports that you'd really struggle to saturate with a gigabit connection - I used to see the lack of sata as a major problem with that platform but nowadays it really doesn't matter.

AFAIK the USB ports on RPi are shared with other peripherals. And there is no way you can connect more than 2 SATA drives without additional HW .

On Rpi 4 the USB 3.0 ports get their own dedicated USB 3.0 controller that's connected through a PCIe 3.0 1x bus. They don't share bandwidth with anything else.
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