Questions tagged [cluster]

A group of computers acting as one super-computer.

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Kubernetes Cert-Manager fails issuing certificate with DNS01 webhook

I want to learn about cluster computing and I so happens to have 3 x Raspberry Pi laying around. I also want to learn about Kubernetes, so an excellent way to do this is by installing K3S because it ...
Lasse Michael Mølgaard's user avatar
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1 answer
50 views

Help with "-bash: syntax error near unexpected token `do' "

Background: Yes, I'm a noob. I've been learning Debian Linux the last several months. Here's the situation: I have 10 Raspberry Pi's (3B+) with hostname rpi-100 to rpi-109. I am trying to automate ...
Myszek512's user avatar
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21 views

Motor control for multiple raspis

I am building a Lego robotic arm with several motors. I plan to buy two Build HATs which can host up to 4 motors/sensors each. Since those HATs are not stackable, I presume I need to use 2 Raspis. The ...
Jimakos's user avatar
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43 views

Case for multiple different versions of pi

Firstly, I'm not building a cluster, but due to lack of space, I just want to put my Pis into one case where they can share power and ethernet (POE) I currently have a Pi 3B and 4B with plans on ...
ouroboruss's user avatar
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1 answer
29 views

Unable to run linpack on head node of cluster

I recently set up my own home cluster - 4 units of raspberry pi. But I am having problems trying to benchmark all 4 units using Linpack One node is the head node called rpislave1, it connects to the ...
AlexChan's user avatar
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72 views

I need help making a raspberry pi zero w Cluster

I want to make a raspberry pi zero w Cluster but I want to make the main computer my raspberry pi4. But I can’t find any Tutorials that have this case. I already have 11 pi zeros an internet switch ((...
Isaac Clark's user avatar
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33 views

Can ping, but cannot ssh or ssh-copy-id between two Pis connected over Ethernet

I am trying to cluster two Pis, one 3A+ and one 0, by connecting them over Ethernet. They are connected directly via an Ethernet cable with Ethernet-to-USB/MicroUSB adapters on either side of the ...
Vanessa's user avatar
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Can you create kubernetes cluster with raspberry pi and a notebook [duplicate]

I am new to containers, docker and kubernetes but I see many videos where people create raspberry pi clusters and run servers (e.g. minecraft) on them. I would like to know if it is possible to create ...
Michael Kročka's user avatar
1 vote
2 answers
210 views

Running a cluster of 65 Raspberry Pis with one SD Card (is it possible?)

I've recently gotten the task of setting up a Raspberry Pi cluster (64 Raspberry Pi, and 1 PXE server running on the 65th Raspberry Pi) As this project is not 100% built by me, and the guy who built ...
BobbyGopnik's user avatar
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1 answer
133 views

do i get more io from a cluster?

suppose i have a cluster of 2 pi 4s (8 gig model and 32gb sd cards). i will get 2 seperate computers together having 4 cores and 8gb ram (based on jeff geerling's blog https://www.jeffgeerling.com/...
user135142's user avatar
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Designing a small server on pi 4s cluster

i am a full stack and mobile dev and i am slowly getting into infraestructure. Since i am doing small apps for a maximum of 20 to 100 concurrent users, i want to make a small server and i thought of ...
Santiago Linietsky's user avatar
-3 votes
1 answer
142 views

Can two raspberry pi zeros communicate through the hdmi port?

I want to cluster a bunch of raspberry pi zeros together through their hdmi ports since that port seems to be the only one that can handle 8megapixels worth of data at 60 FPS but from what I’ve read ...
user11937382's user avatar
-2 votes
2 answers
45 views

does disconnecting my rpi cluster's ethenet switch generate error? i'm a bit nervous about this one [closed]

i've built a 25 node rpi cluster with a ups for the rpis. but not for the ethernet switch. does turning off my gigabit impact my cluster? if yes, please tell me what i can do about it.
user135142's user avatar
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What tasks can be performed faster on a raspberry pi cluster?

I've recently seen that some companies use raspberry pi clusters as supercomputers. For example, Los Alamos National Laboratory has a supercomputer with 750 Raspberry Pi 3. And I was thinking if you ...
ajr-dev's user avatar
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1 answer
101 views

Extending clusters by using USB hubs

Just heard of this "cluster HAT" which is basically a USB hub. Assembly is quiet simple. For me is 4 zeros not enough. So can I use normal larger hub to make a bigger cluster? Most important ...
user135142's user avatar
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raspberry pi cluster taking forever to run mpirun

Hi so I have been following the guide: Raspberry Pi Supercomputing and Scientific Programming and in Chapter 6 I need to run the following command: mpirun -hostfile myhostfile -np 4 hostname where ...
YOLOLJJ's user avatar
3 votes
5 answers
4k views

How to power Rpi4 cluster?

Although I did some research I will still ask, maybe somebody come up with something new. I have 9 node Rpi4B+ cluster Under load I have noticed that some nodes start getting Under-voltage errors. At ...
VladoPortos's user avatar
1 vote
0 answers
127 views

Cluster Computing - Raspberry Pi and Julia

I'm hoping to setup a cluster at home for a physics simulation I'm planning on running. However I don't have any real experience with HPC and I figured I should start with a small cluster just to ...
Fuzzy_Bunnys's user avatar
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1 answer
878 views

Pi 4: Keep USB powered when rebooting

I'm using a ClusterHat v2.3 on a Raspberry Pi 4. On rebooting, the USB Ports losing power, so the cluster nodes as well. Is there a way to configure the Pi 4 to keep the USB power on when rebooting / ...
perryflynn's user avatar
2 votes
1 answer
842 views

What is main use cases to build a kubernetes on a Raspberry pi cluster?

I want to evaluate the benefits of having a Pi Kubernetes cluster. Mostly I read that this project is about learning Kubernetes and hosting personal websites. Well, I understand that the learning can ...
A.Dumas's user avatar
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4 votes
3 answers
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Raspberry Pi Cluster for Computation

I am new to Raspberry Pi's (as well as this stackexchange) and would like to use them to learn how to build a small cluster. (Currently using this guide: https://medium.com/@glmdev/building-a-...
bark's user avatar
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121 views

RPI cluster - Quality vs Quantity

If I have a fixed amount of money to invest in making a cluster, let's say 165$, I could buy 4 'rpi 4's(1GB ram) or 3 'rpi 4's(4GB ram), or 33 rpi zeros. Thinking about the cost of the boards only, ...
Du Brisingr Arget's user avatar
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2 answers
224 views

Raspberry PI 3 A+ x5 Cluster PSU Needed Recommendation

I plan to make this x5-x6 RPI 3 A+ cluster but I am no sure what USB Charger to use. I would really prefer something with 5-6 ports. I know the spec for output are 5V/2.5A and I plan to use it in ...
Jeremy Wayne's user avatar
1 vote
0 answers
646 views

Can the Raspberry Pi cluster be used with Unreal Engine 4 to split up tasks and make it faster?

I am planning on building a raspberry pi cluster with my computer so can it be used to run UE4 faster and more efficiently on my computer than without the raspberry pi cluster(4 raspberry pi’s)?
Master's user avatar
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2 votes
2 answers
785 views

RPi 4 - 8 nodes - Appropriate switch for POE

I was thinking about an 8 port switch that can provide my 8 RPi's 4 power over POE. I think i have found one according to my needs ( small dimensions), namely the: Ubiquiti EdgeSwitch 10XP - https://...
NicoJuicy's user avatar
  • 166
2 votes
1 answer
815 views

Can I just create a python thread per raspberry pi for parallel processing?

I have been looking to make a cluster of raspberry pi 4s, and have been pretty interested in it and made good head way. I have seen quite a few guides on the topic as well. I followed this one found ...
David Frick's user avatar
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0 answers
128 views

Static IP address on the Raspberry PI 3 in combined network

I building cluster computer with two Raspberry PI 3 where I have 1 internet router and one LAN switcher. Both Raspberry PI are connected to the switcher. Internet router gateway is 192.168.1.1 LAN ...
Ivijan Stefan Stipić's user avatar
1 vote
1 answer
111 views

Is my ClusterHat faulty or my RPi GPIO fried?

I've been using a ClusterHat (1RPi + 4 PiZeroes) and all has been well until recently. The PiZeros boot off the RPi's SD card using the ClusterHAT-2018-10-09-lite-1-usbboot boot image, and when I ...
Nick's user avatar
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3 votes
2 answers
1k views

Cost-effectiveness of Pi cluster

Does it make sense to use Pi cluster for real computation? My use case is to carry out intensive computation tasks 24/7. The tasks are pleasantly parallel, and there will be minimum inter-node ...
user avatar
-1 votes
1 answer
235 views

mpiexec with mpi4py not executing on startup raspberry pi

I have a python programme that works out primes that I have set up with mpi4py, for it to run on my raspberry pi cluster, and I can normally run the command from any directory but when I put it in rc....
Hein Gertenbach's user avatar
1 vote
0 answers
429 views

PI2/3 Cluster with Hass.io (Home Assistant)

I have a Raspberry PI Cluster (1 master PI/2, 2 workers PI/3) with Raspbian, Docker, Kubernetes installed. I have no volumes defined (OpenEBS seems not officially supported yet). I initialized helm ...
danyolgiax's user avatar
1 vote
0 answers
340 views

Raspberry Pi Cluster Computing With MPI

So I have followed this tutorial on how to make a Raspberry PI cluster computer. It works great, I can parallel my processes with MPI, but I'm also wondering if this is possible. Currently, all four ...
Widdles's user avatar
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0 answers
32 views

How to attach two raspberry pi zero w together with sepatate independent displays?

How do I attach two raspberry pi zero w's together with sepatate independent displays to function as "one computer with extended display on two panels"? The two displays are HDMI with usb touch (7 ...
ironmantis7x's user avatar
2 votes
0 answers
220 views

Technologies to use in a peer to peer, file sync, high availability, cluster like, backup solution [closed]

I've been doing research on how to setup a self host backup high availability solution using raspberry pi's. The biggest requirement is master to master replication and cross platform client support. ...
lastlink's user avatar
  • 121
2 votes
1 answer
931 views

TensorFlow on a ClusterHat

Has anyone experience of running distributed AI on the Cluster Hat using Pi Zeroes? Specifically, can I run TensorFlow on a Cluster HAT ideally using the GPUs on the PiZeros as well as on the ...
Nick's user avatar
  • 776
3 votes
1 answer
833 views

Is it viable to run a cluster of Pis on PoE?

I’m thinking of experimenting with clustering RPis, but the thought of that mess of equipment (switch + multi-port USB charger) and cables is a bit of a turn-off. Does anyone know if there are any ...
Ryan Lue's user avatar
  • 139
1 vote
0 answers
87 views

Duplicate output in MPIEXEC

I have installed MPI on my 3 node raspberry-pi 3B+ cluster and whenever I run any command I get 12 replies, 4 from each node, as an example, when I run mpirun -machinefile machine-file hostname I get ...
DesertPunk's user avatar
2 votes
2 answers
2k views

RPi cluster or a dual Xeon

I have a text processing project that is currently Bash, GNU Parallel and other command-line tools. It's getting moved to a C++ queue type design. It is about 14,000 files each day, plus performing ...
Jasmine's user avatar
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0 votes
1 answer
295 views

is it possible to set up a Raspberry pi cluster to act as a single pi with increased resources?

I have acquired some extra raspberry pi's and am looking to make use of them all in some way. As I have been reading around, all of the "turn your Pi into a supercomputer" articles are only referring ...
DeveloperACE's user avatar
3 votes
3 answers
2k views

Combine 2 Raspberry Pi 3

Can i somehow combine 2 Pi's so i have a better CPU speed? I'm new to this so a link to some tutorials (if possible) would be nice I know you can create a cluster for a database so you can scale it, ...
Sp3ct4cul4r's user avatar
1 vote
1 answer
179 views

A way to connect M RaspiCams to N raspberry Pi Compute modules, where M>>N?

I am planning to set up camera rig, which will require 10+ cameras (preferred 20+ or "as many as possible" in spatial arrangement around the observed area. The setup will be academic, experimental, ...
xmp125a's user avatar
  • 316
-1 votes
1 answer
385 views

Blockchain and Raspberry Pi [closed]

I'm bit new to this technology called blockchain. I'm trying to make a small prototype on blockchain for some learning purpose. After reading few related contents I found it requires a distributed ...
vijayraj34's user avatar
0 votes
2 answers
243 views

Raspberry Pi Cluster Pinout [closed]

I need 2 raspberry pi for my project (i'll use all pins on both pi's) and i want to control them with an interface on my laptop (used python tkinter) but i couldn't figured how to use both pi's. Maybe ...
Can's user avatar
  • 11
0 votes
2 answers
839 views

Powering a number of Pi from a single bench top power supply [closed]

I'm thinking of investigating the Bitscope Blade QUATTRO to host up to forty boards. Looking at the details each Blade can power the boards off a single supply, which need not be at 5V with up to 3A (...
Nick's user avatar
  • 776
0 votes
1 answer
97 views

Adding non-ARM devices to bramble cluster

I've started a project to build my first Pi cluster and am currently setting up a cluster of three Rpi 3B+ boards each running the latest version of Debian My understanding is that that'll equate to ...
Kevin's user avatar
  • 13
0 votes
1 answer
503 views

Can Pi Zeros be used in a cluster like Pi 3s?

I am planning to run a cluster of Raspberry Pi Zeros. I know we can do it with a cluster of Pi 3 boards but I want to know is the same possible with Pi Zero?
sam yo's user avatar
  • 3
1 vote
1 answer
1k views

Raspberry Pi 3 Cluster

I was looking to make a Raspberry Pi 3 cluster just for the fun of it and for learning a bit about how clusters work. From my research I have seen that the cluster concept follows 1 machine which is ...
user avatar
0 votes
1 answer
773 views

Raspberry Pi 3B Dual [closed]

Bought our first Raspberry Pi months ago installed Raspbian but when playing a video there was some stutter Then we had an idea buy a second Raspberry Pi and fuse the two together now the real ...
MA18EN's user avatar
  • 1
0 votes
1 answer
676 views

Unable to reach pi cluster with hostnames on network

I'm currently working on a project using 4 raspberry pi as a cluster. These pi's are attached to each other through a local network, but I need to be able to send command to it from a host computer ...
TH3Mitch's user avatar
1 vote
1 answer
74 views

max number of Pi 3's to safely plug into a wall [duplicate]

This post is basically a repeat of: Is there a maximum number of Pis that I can power from the same wall socket? However my situation is slightly modified. Particularly for wall sockets in Denmark, ...
mapema's user avatar
  • 13