<patagonicus>
The HC2s have a blue LED that shows status. I noticed that sometimes it's blinking faster and I'm assuming that's when they get hot. Is that something that is controlled by Linux or is that a firmware thing?
<samueldr>
Linux can have some control on that
<samueldr>
/sys/class/leds/*/trigger
<samueldr>
though it could be that your board has some other system
<patagonicus>
Ah, there's one called "blue:heartbeat", that sounds like the right one. :)
<samueldr>
the usual naming scheme for linux mainline is colour:logical_name
<samueldr>
heartbeat is generally arbitrary here
<patagonicus>
Ok, so it's not based on temperature but on CPU activity, which is correlated.
<samueldr>
it's kind of a default the vendor wants
<samueldr>
yeah
<samueldr>
it can also be configured
<patagonicus>
I also wonder if it's because of the heat here, but I had to move my desk fan to the side with the board instead of blowing air past the HDDs and then the board or they would shut down under load. I hope once I have the mount for the PC fan that will get better, but I'm honestly not sure. Maybe I'll have to figure out a different cooling solution.
<patagonicus>
and/or it's the oomkiller. Sigh.
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<patagonicus>
Swapping to an encrypted microsd card is great. The whole machine becomes unresponsive for 20 minutes at a time, not even able to respond to Prometheus trying to scrape metrics.
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<samueldr>
ooh
<samueldr>
sd cards
<samueldr>
not even once :(
<patagonicus>
Yeah. I'll move the swap to the HDDs. I'll probably have some time on the weekend, but first I want to upgrade the packages and node just eats all the RAM.
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<patagonicus>
Wow. 2GB RAM + 7GB swap isn't enough. Can Linux handle 10TB of swap, because I have some unused disks lying around …
<samueldr>
there's only one way to know
<patagonicus>
Answer: kinda. It happily formatted sda as 10TB of swap, but after swapon I "only" have ~135G of free swap.
<patagonicus>
I guess I could do ~70 partitions of 128GB swap each, but on the other hand, if node doesn't build with 128GB of swap, I don't think I want it.
<samueldr>
haha
<samueldr>
32 bit, right?
<samueldr>
each process is limited
<samueldr>
firefox can't link because of that IIRC
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<samueldr>
I would kinda assume the same for node?
<samueldr>
PAE is good for the whole system, but IIRC each process is still limited
<patagonicus>
Hmm. Good point. But I managed to build it before, it's jist failing now while rebuilding everything after rebasing my nixpkgs. Hope they didn't do something to increase the memory needed for linking.
<samueldr>
it might have already been close to the limit though
<samueldr>
if there is someone _knowledgeable about NixOS and aarch64_, there is an offer standing on the pine64 IRC for a (used) "ISO" Pinebook Pro to get in the hands of a distro developer, cc @tophneal and me in that room if you're interested (it may also go to another developer, though the offer is there)
<samueldr>
*for the price of shipping
<gchristensen>
nice!
<samueldr>
or uh, just hit me here finally
<samueldr>
(I'll get in touch with 'em since they're going to be off-and-on)
<sphalerite>
if nobody else is volunteering, I would, though I don't have much time atm
<samueldr>
there is an implicit expectation to actively take time to work on that :)
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