> On 27 Nov 2022, at 17:28, Jan Stary <h...@stare.cz> wrote:
>
> On Nov 27 17:10:11, mytraddr...@gmail.com wrote:
>> I am not intending to switch the machine.
>
> Why?
It is just not an option for this specific project.
>
>> In terms of resources, I am mainly concerned about hard drives
>> and cpu being worn down unnecessarily. I am not sure how much
>> of a concern this should be though.
>
> The CPU is not being "worn down" by running.
>
> As for rotating metal disks, they have a lifetime;
> that's why replacing them with SSD might be your best bet.
In the case of an SDD, is there no consideration of turning them off, if they
are unused for some time?
In the case of HDD, are you saying that putting them in "spun down" mode
actually would not increase their lifetime?
>
> But even regular disks are dirt cheap now.
> I don't believe this concern is even worth the time spent on this.
>
>> Yes, I do know in advance when the machine needs to run and when it can
>> sleep.
>
> Then you can set a wakeup alarm in the BIOS (if it has one),
> and simply shutdown -p via cron, at the appropriate time.
Ok, thanks for that. I will explore whether the bios has a wake alarm
>
>> "How much resources would that save?" -> My thoughts was that
>> it would be better for hard drive longevity to have them spun down,
>> rather than them being up for months without any access needed.
>
> Wait, so you know in advance for how many _months_
> the machine can sleep?
Yes...
>
>
>>
>>> On 27 Nov 2022, at 15:50, Jan Stary <h...@stare.cz> wrote:
>>>
>>> On Nov 27 09:37:19, mytraddr...@gmail.com wrote:
>>>> The main thing I am trying to do is to make it sleep
>>>> every now and then to protect resources.
>>>
>>> How much eletricity does the machine eat?
>>> (What other "resources" are you concerned about?)
>>>
>>>> 1) Make it sleep and wake up when woken up remotely
>>>> I investigated Wake On Lan, which I enabled via ifconfig. However, this
>>>> system is deployed remotely, and I have no access to other computers on
>>>> the LAN, so I am unable to make this work.
>>>>
>>>> 2) Make it sleep for a few hours and then wake up
>>>
>>> Do you know in advance at what hours the machine
>>> needs to run, and when it can sleep?
>>>
>>>> After 3hours+ of research in man pages and the internet,
>>>> I have not seen any solution for that.
>>>
>>> Some machines have a wake option in their BIOS.
>>>
>>>> 3) hard drives Spin down, CPU lower freq
>>>> I have been able to lower the CPU speed by running `apm -L`.
>>>
>>> How much electricity have you saved by that?
>>>
>>>> I haven't been able to spin down the hard drives.
>>>
>>> How much resources would that save?
>>>
>>> I you are concerned about resources, wouldn't you be better off
>>> getting a low-power machine, with SSD disks? There are machines
>>> out there that eat around 10W and get the job done (dependeing
>>> on the job of course); and SSD doesn't need to spin down.
>>>
>>>> I cannot share the full dmesg for security reasons
>>>
>>> Bullshit.
>>>
>>
>>
