Finally I was able to finish print and assembly of the cluster rack case. Some missing parts needed to be fetched which was a sometimes a little complicated because of COVID restrictions. Instead of ordering things via Amazon prime I allways support the local stores for sourcing.
The cluster rack case became finally Mark III-ish. Because of the PoE HATs I needed to print some spacers in order to fit each Pi. Because of the modding I was only able to fit four 80mm fans in the back of the case. Cooling airflow seems to be sufficient anyway. The Case can hold 11 Raspberry Pi4 with Waveshare PoE HATs.
Cluster rack case parts:
- Cluster Case design based on Uptime Labs Pi Server Mark III
- 19″ 8 U Studio Rack from Thomann
- Parts printed on Prusa 3D Mini+ with FormFutura Volcano PLA
- XILENCE Case Fans 80x80x25mm for cooling, wiring adaptors, CAT6a SFTP Cables from local IT Shop
- Keystone Patch Panel, Blanks, CAT6a inlets from berrybase.de
- 1 U Cable Management Plate from Serverschrank24.de
- 1 U Server Rack Cover Plate by XDr4g0nX (thingiverse)
- 16 Port PoE Switch UbiQuiti Unifi Switch US-16-150W Gen1
In March 2021 the K3S Cluster was also expanded with 2 more Raspberry Pi4 8 GB Nodes. The cluster consits now of 6 Raspberry Pi4.
Last month I added 32 Bit support to the K3S BOINC Pods. The Cluster is now volunteering on Rosetta@home (64Bit), LHC@home (64Bit), Einstein@home (64Bit), Universe@home (32 Bit) and Asteroids@home (32Bit). Ressourece share for each Project is now 20%.
I was wondering why BOINC Client pods only used 3 CPU for processing. Finally I found a setting BAM!Stats setting where computing was limited to 3 CPU. I could not remember that I set this limit there. Anyway … the limit is now removed and each pod is now processing 4 tasks in parallel.
Because of Cluster assembling and fitting parts I had to shutdown the cluster a couple of times. I summarized the finished tasks from 01.03.2021 to 30.03.2021. Aborted tasks or tasks with runtime 0:00 have been removed from this analysis. Statistics have been collected with BoincTasks and summarized in Excel. 2310 Tasks have been completed in total. Results:
| Project | Application | Tasks done | Avg (h) | Min (h) | Max (h) |
| Einstein@Home | einsteinbinary_BRP4 | 1078 | 2,44 | 1,83 | 3,64 |
| Rosetta@Home | Rosetta | 341 | 8,46 | 1,80 | 10,53 |
| LHC@Home | SixTrack | 185 | 10,08 | 0,01 | 17,40 |
| Universe@Home | Universe BHspin v2 | 456 | 4,56 | 1,91 | 7,30 |
| Universe@Home | Universe ULX | 136 | 0,47 | 0,33 | 0,61 |
| Asteroids@Home | Period Search Application | 114 | 14,01 | 2,32 | 22,31 |
Happy crunching !
