Let's Build a 28-Core Raspberry Pi Cluster

#1

Post by ColinWright » Tue, Aug 11, 2020, 10:25 PM UTC

Let's Build a 28-Core Raspberry Pi Cluster
ikarus.sg

Re: Let's Build a 28-Core Raspberry Pi Cluster

#2

Post by WaxProlix » Wed, Aug 12, 2020, 12:03 AM UTC

Seems down, here's a google cache of it https://webcache.googleusercontent.com/search?q=cache:lIePhG...

Re: Let's Build a 28-Core Raspberry Pi Cluster

#3

Post by kanobo » Wed, Aug 12, 2020, 12:25 AM UTC

WaxProlix wrote: post #2

Seems down, here's a google cache of it https://webcache.googleusercontent.com/search?q=cache:lIePhG...

Thanks, I wonder if the site was hosted on the Pi Cluster?

Re: Let's Build a 28-Core Raspberry Pi Cluster

#4

Post by daneel_w » Wed, Aug 12, 2020, 12:25 AM UTC

Neat setup. An alternative would perhaps be a Pine64 Clusterboard with 7 SOPINE modules: https://store.pine64.org/product/clusterboard-with-7-sopine-...

Re: Let's Build a 28-Core Raspberry Pi Cluster

#5

Post by mdoms » Wed, Aug 12, 2020, 12:49 AM UTC

Am I understanding that he is storing web data on the SD cards of the Pis? Is that normal? SD storage is notoriously unreliable, especially in write-heavy applications.

Re: Let's Build a 28-Core Raspberry Pi Cluster

#6

Post by sedatk » Wed, Aug 12, 2020, 12:49 AM UTC

kanobo wrote: post #3

WaxProlix wrote: post #2

Seems down, here's a google cache of it https://webcache.googleusercontent.com/search?q=cache:lIePhG...

Thanks, I wonder if the site was hosted on the Pi Cluster?

It's back up now.

Re: Let's Build a 28-Core Raspberry Pi Cluster

#7

Post by magicalhippo » Wed, Aug 12, 2020, 12:53 AM UTC

So I was toying with the idea of something similar. I'm a programmer and not a sysadmin, but I've dabbled with Docker and had a specific use-case.

But so far I've not come further than this: how to deal with the host OS?

Like, I don't want to log into N computers and manually run "sudo apt update" etc. I want them to run the same OS but with slightly different configurations.

Network booting via PXE seems to be the best alternative, but not sure how to prepare the images for distribution.

Anyone got any pointers on how this is best done?

edit: I should mention I just found http://cobbler.github.io/ but haven't had time to investigate it. A viable choice?

Re: Let's Build a 28-Core Raspberry Pi Cluster

#8

Post by beachy » Wed, Aug 12, 2020, 1:01 AM UTC

I have to admire someone who spends their first paycheck on a pi cluster:

> The total damage my wallet sustained from Kraken was S$626.63 or in $449.73 USD, which was virtually all I had left for the month after subtracting expenses and education loan repayments.

Re: Let's Build a 28-Core Raspberry Pi Cluster

#9

Post by kristianp » Wed, Aug 12, 2020, 1:01 AM UTC

"I started noticing the performance bottlenecks started when I tried to run Wordpress on it, where a single page load of a newly installed Wordpress blog takes about 10 seconds!"

10 seconds is probably not bad for an uncached wordpress page.

Re: Let's Build a 28-Core Raspberry Pi Cluster

#10

Post by LeoPanthera » Wed, Aug 12, 2020, 1:01 AM UTC

mdoms wrote: post #5

Am I understanding that he is storing web data on the SD cards of the Pis? Is that normal? SD storage is notoriously unreliable, especially in write-heavy applications.

"Endurance" microSD cards, normally sold for use in dashcams, are much more reliable in the Pi.

However I switched to netbooting my Pis, no local storage on the Pi at all.

This does require you to have a netboot server already, of course.