Posts by hnapel

1) Message boards : Number crunching : Peer certificate cannot be authenticated with given CA certificates (Message 97044)
Posted 31 May 2020 by Profile hnapel

instead of using command prompt (which I found wasn't working for me, probably did something wrong but *shrug*
I instead used Properties - Security - and gave users full control over that file. Used notepad to edit and could save no issue.

You can also open Notepad as administrator and it will work to save the file after the edit.
2) Message boards : Number crunching : Running on a 4GB Raspberry Pi 4 - How to? (Message 96019)
Posted 4 May 2020 by Profile hnapel
This is a general problem with the PI4 if you put any load on it, you need to install active cooling. B.t.w. the device will not get killed so easily, when the temperature gets over 80 degrees Celsius, a throttling mechanism comes into play, but running the thing at 80 degrees all the time may adversely affect its longevity, so try to shave off some degrees with a cooler or there's also massive cooling blocks that cover the whole little board.
3) Message boards : Number crunching : How I overclocked my raspberry pi 4 (Message 96016)
Posted 4 May 2020 by Profile hnapel
I discovered that if I crank up the raspberry pi 4 (4GB version) to 1750 Mhz (from default 1500) the average credit is at this point just over 1000 points, it runs 3 simultaneous WUs for R@H, also I embellished the device with a CPU cooler (1/4 of a harvested piece from another mainboard) and a makeshift cooling fan.

This is the device:

I used instructions from this site:



temperature is now around 54 degrees Celsius, active cooling is required since the PI4 already has a cooling problem out of the box.
4) Message boards : Number crunching : The most efficient cruncher rig possible (Message 95494)
Posted 28 Apr 2020 by Profile hnapel
This got me thinking, the discussion about processing lots of work is right to involve what amount can be done given the price of the hardware and the power required to operate it. The information on the ADM site is hilarious in that respect: "Exceptional Processors Deserve Exceptional Cooling". Well if their processors would be so exceptional, maybe they should require less cooling! The discussion in general is also shifted from sheer performance to how may FLOPS can I churn out for any given amount of Wattage, the high end PCs (apart from already being overpriced) are likely not on the optimum. There are developments in opto-electronics that will hopefully shift the balance in the near term future. A guy named Dyson who recently died had the vision that highly civilized extraterrestrial beings would try to harvest all the energy from their star with a gigantic encompassing structure, this was referred to as a Dyson Sphere, for all his ingenuity, Dyson did not theorize that if those beings were so smart as to get to that state, they would also maybe have invented some more energy efficient processors.
5) Message boards : Number crunching : Discussion on increasing the default run time (Message 95149)
Posted 22 Apr 2020 by Profile hnapel
Great I'm replying to a 12 year old post! But I don't see my question answered anywhere: If I increase the runtime from the (now) default 8 hours to for example 12 to help in reducing the load on the servers will the larger runtime also have an increased requirement on RAM usage? Will the workunits received be actually different or does it just try more science on the same units?
6) Questions and Answers : Unix/Linux : Rosetta@home does not work on Raspberry Pi 3b + (Message 94751)
Posted 18 Apr 2020 by Profile hnapel
Note I have a a PI4 with 4GB of RAM, I think the 1GB and 2 GB versions should in fact not have been produced, considering the memory requirements and the 64 bit version of raspbian only further developed on the PI4 I think trying it on the rpi3 is a dead end.
7) Questions and Answers : Unix/Linux : Rosetta@home does not work on Raspberry Pi 3b + (Message 94748)
Posted 18 Apr 2020 by Profile hnapel
hj there,

I got it to work on raspbian too, I had this already installed and it seemed more work to re-image with ubuntu64, the steps are:

- enter arm_64bit=1 in /boot/config.txt
- run sudo rpi-update
- edit /etc/boinc-client/cc_config.xml and add:


8) Message boards : News : Rosetta's role in fighting coronavirus (Message 94664)
Posted 17 Apr 2020 by Profile hnapel
hi there,

since r@h is CPU only, if you also want your GPU to work on covid related tasks you can apply for Folding@home, they have both CPU and GPU tasks, however if you remove the CPU slot you will only get GPU tasks and works on both projects without affecting each other (the GPU tasks require a little CPU to feed the GPU but it is minimal). This is how I roll currently, please note r@h and f@h are not strict competitors but their science complements each other, currently f@h got a lot of press and a surge in contributors and they hardly can keep up with the supply of WUs. This is quite funny since r@h was already working on covid and it became clear in these forums when someone's computer crashed that an admin said something like yeah these covid jobs require a lot of memory... Anyway it is up to individuals where to put their hardware to use,


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