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 ...
0 votes
1 answer
45 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 ...
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0 answers
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 ...
3 votes
1 answer
830 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 ...
0 votes
0 answers
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 ...
0 votes
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 ...
0 votes
0 answers
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 ((...
4 votes
2 answers
3k views

Is it possible to do GPU-accelerated tasks on a raspberry pi?

I have been looking into doing some cluster computing on several raspberry pis. Is it possible to use any kind of GPU acceleration on a pi?
0 votes
3 answers
6k views

VMware across clustered Raspberry Pi

I've read many threads about gaming clusters that always end up in "your software isn't built for clustering", but I've been lead to believe that VMware IS built for clusters. That being said, if I ...
0 votes
1 answer
197 views

Mounting holes of Pi3 same as Parallella?

I am planning to buy a RaspberryPi 3 to get started on that, but wanted to prepare for the future by buying a stackable case. Now I also read about the Parallella and find the idea very interesting ...
1 vote
2 answers
204 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 ...
70 votes
7 answers
41k views

How do I build a cluster?

There have been a few articles floating around online over the last few years about building a cluster of computers at home - here for example. The Pi strikes me as a good platform for building / ...
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0 answers
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 ...
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0 answers
10 views

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 ...
0 votes
1 answer
130 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/...
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0 answers
34 views

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 ...
4 votes
1 answer
503 views

Is it possible to install Rocks Cluster Distribution on Raspberry Pi?

There are lots of websites about making a supercomputer with Raspberry Pi. Is it possible to install "Rocks Cluster Distribution" on Raspberry to have a more efficient cluster?
-3 votes
1 answer
140 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 ...
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 ...
-2 votes
2 answers
44 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.
0 votes
2 answers
3k views

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 ...
2 votes
1 answer
813 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 ...
1 vote
1 answer
100 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 ...
0 votes
0 answers
37 views

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 ...
3 votes
3 answers
1k views

largest raspberry pi cluster

To my knowledge the cluster built by GCHQs is the currently the largest one. Does anyone know of a larger cluster currently being created? I found a 300 Pi cluster being built by this group http://...
2 votes
2 answers
784 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://...
-1 votes
1 answer
234 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....
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 ...
0 votes
1 answer
290 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 ...
0 votes
1 answer
874 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 / ...
2 votes
0 answers
2k views

How to connect multiple Pi Zero ethernet gadgets to a Pi 2?

I followed this guide to turn my Raspberry Pi Zeroes into ethernet gadgets and I did not change anything in the /etc/network/interfaces or /etc/dhcpcd.conf files. All of the SD cards were fresh ...
2 votes
1 answer
836 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 ...
6 votes
4 answers
14k views

Raspberry Pi for Machine Learning

I’m a software engineer interested (and doing research) in machine learning. For some of my machine learning models, I need more computational power than which offered by a single computer. Presently,...
1 vote
1 answer
1k views

GUI on Raspberry Pi cluster

I was thinking of building a small cluster (due to the small price) but i want to know if i can get a gui (like xfce or lxde) to run o the master/ host or whatever.
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 ...
0 votes
2 answers
223 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 ...
4 votes
3 answers
991 views

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-...
0 votes
0 answers
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, ...
1 vote
0 answers
645 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)?
0 votes
1 answer
675 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 ...
0 votes
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 ...
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 ...
1 vote
0 answers
428 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 ...
1 vote
0 answers
339 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 ...
0 votes
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 ...
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 ...
2 votes
0 answers
219 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. ...
1 vote
1 answer
178 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, ...
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 ...
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, ...