Questions tagged [cluster]

A group of computers acting as one super-computer.

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Share wireless internet from RPI4 to RPI0 over usb without changing the routed access point

I'm trying to use a RPI4 as a routed access point so that I can use a USB wifi dongle to connect with my laptop or other devices. I have this part complete by following the RPI documentation. Next I ...
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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 ...
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running a cluster of 65 raspberrys with one sd card (is it possible?)

I've recently gotten the task of setting up a cluster of raspberry pis (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 ...
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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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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 ...
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-3 votes
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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 ...
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-2 votes
2 answers
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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.
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435 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 ...
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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 ...
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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 ...
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3 votes
5 answers
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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 ...
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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 ...
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363 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 / ...
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2 votes
1 answer
724 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 ...
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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-...
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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, ...
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2 answers
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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 ...
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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)?
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2 votes
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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://...
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2 votes
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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 ...
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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 ...
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1 vote
1 answer
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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 ...
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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 ...
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-1 votes
1 answer
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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....
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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 ...
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1 vote
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239 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 ...
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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 ...
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1 vote
0 answers
165 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. ...
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2 votes
1 answer
832 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 ...
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3 votes
1 answer
692 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 ...
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1 vote
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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 ...
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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 ...
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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 ...
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3 votes
3 answers
1k 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, ...
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1 vote
1 answer
149 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, ...
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-1 votes
1 answer
297 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 ...
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0 votes
2 answers
218 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 ...
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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 (...
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0 votes
1 answer
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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 ...
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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?
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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 ...
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0 votes
1 answer
762 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 ...
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1 answer
597 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 ...
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1 vote
1 answer
66 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, ...
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1 answer
326 views

RPi Cluster for Materials Research

I'm Materials Science student interested in using an RPi cluster for calculations of materials properties. I'm very new to HPC but what I know about the RPI is that its processor is based on the ARM ...
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430 views

BitLocker Brute Force

I have a couple of hard drives from my old Windows PC setup which are encrypted with BitLocker. One is 160GB and the other is 320GB. Since switching to using a Mac, they have sat for the past 5 or ...
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1 vote
1 answer
802 views

Pi Zero Cluster with Lan over Usb

I want to buy some Pi Zeros and build a cluster. I wanted to ask if i add an Ethernet port through a mini-USB to Usb OTG Adapter and a RJ45 Adapter, then the Pi Zero would function like the standard ...
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1k views

How do I open protocols and ports between two hosts

I am trying to configure my Docker Swarm Cluster and need to have the following ports open so that my cluster can communicate and operate correctly: TCP port 2377 TCP port and UDP port 7946 UDP port ...
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1 answer
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RetroPie with multiple Pi 3s

I currently have a Rasp Pi 3 Model B running RetroPie on Raspbian that is wiring well enough, it can play everything pre-N64 fairly well, and can get through many of the N64 games out there with ...
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Is ethernet more efficient than wireless on a Pi

I'm thinking of building a small Pi cluster using a Bramble case or three, but I'm put off by the hassle of having a mess of Ethernet cables and a large router connecting together 10 or so so small ...
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