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Let's Build a 28-Core Raspberry Pi Cluster

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

#151

Post by justinclift »

jp0d wrote: post #80
redis_mlc wrote: post #67

Earlier quoted context omitted.

> How is the performance output compared to a regular desktop Sorry, but often budget (junk) CPUs are only 10% of the performance of current desktop-class processors. You can use "openssl speed" to test and compare performance. When I was experimenting with Intel's Atom netbook chip, it was exactly 10% of a Xeon thread. So it could be used for httpd static content, but not java. > It'd be an interesting setup to test…

Thanks man.. I know. I've an old Asus laptop/netbook with an Atom processor. Quad-core I might add. The travesty! It's slow as hell. I bought it because it had an 11 inch screen and I wanted something small. I bought it for AUD $300 back in 2015. I haven't used it more than a month. It's just part of my electronics junk collection. Now a days I'm a lot more careful before buying these things. That's why I've been hol…

As a general concept, an old low-end laptop can sometimes be usefully repurposed as a low end NAS. It just needs a sufficient amount of ram (depends on the NAS software), and the ability to plug in disks via some means (USB, etc).

It wouldn't be fast, but the battery in it (unless completely dead) even provides some power-outage protection. :)

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

#152

Post by pengaru »

johntash wrote: post #50
pengaru wrote: post #20

Earlier quoted context omitted.

I cannot recommend doing business with pine64, their customer service is nonexistent. If you cancel your order, or need to get ahold of someone @ sales@pine64.org for any exception, in my experience you may as well shout at the nearest wall. - Someone out $165 spent on a cancelled pinephone order, no phone and no refund, complete radio silence.

> - Someone out $165 spent on a cancelled pinephone order, no phone and no refund, complete radio silence. Hopefully you've asked your bank/creditcard to reverse the charge?

Up until hours ago my pending PayPal claim seemed lost in a different form of silent purgatory, but the refund appears to have finally been authorized as of tonight.

I ordered the phone on 5/12, cancelled the order and filed a PayPal "item not received" case on 6/26, escalated the case to a formal PayPal claim on 7/16 (under pressure from PayPal's "close or escalate" automated ultimatum), and as of now it appears the claim finally got refunded on 8/12.

Not a single email response has ever been received from numerous attempts to contact sales@pine64.org throughout this total waste of time and frustration. They ignored requests for updates before I cancelled, seemingly ignored the cancellation, filed an "item shipped" update in the PayPal case on 7/8 despite my cancelling the order on 6/26.

YMMV

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

#153

Post by paines »

cptskippy wrote: post #146
rtkwe wrote: post #144

Earlier quoted context omitted.

It's entirely possible that those options weren't readily available in the local store he's using. I'm not familiar with Singapore in particular but a lot of Asian countries don't have the huge electronics box stores that are common in the US and Europe. I've seen quite a few videos where the best electronic source the person had was what would be a small sized store in a US mall (20 feet wide, one isle with a counte…

> I'm not familiar with Singapore Singapore is a very small (~250 sq mile) country, so it would take less than 30 minutes to drive across. It's very wealthy. It has, almost dead center in the middle, an electronics mall called Sim Lim Tower that's like 10-20 stories tall. They most certainly have options.

And you forgot the superb food and it's variety.

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

#154

Post by rdc12 »

Merocle wrote: post #97

Hello! I did it like this: https://www.instagram.com/p/CC76bkADL-c/ It costed about 3k euro for me. And this one special for k8s: https://www.instagram.com/p/CAqtrRBpNRH/

Is the design files available for the rack mounted version (in particular the clip/holder parts).

Been quite keen to build something similar (albeit less nodes) for a little while. I find the homebrew blade style cluster amusing for some reason.

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

#155

Post by olabyne »

alias_neo wrote: post #137
swebs wrote: post #135

Earlier quoted context omitted.

And photos of the lovely server https://no.wiichan.uwu.mx/meta/res/51.html

How did that load so fast??

Because that seems to be the mirror. The mexican url is https://wiichan.uwu.mx/meta/res/51.html (proof : https://iplookup.flagfox.net/?ip=201.128.144.213&host=wiicha...) It's really cool tho

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

#156

Post by [deleted] »

rcarmo wrote: post #61
sxp wrote: post #24

A slightly cheaper option would be to get a bunch of Pi Zero W devices. They're $10 + SDcards. They would rely on WiFi which might be acceptable if the use case allows having a few dozen radios chattering next to each other. If not, then a $5 Pi Zero + $5-10 ethernet adapter might work. Since the goal isn't to achieve maximum performance, the slow CPU & RAM (comparable to a 20th century desktop) might not be an issue…

Zeros are borderline unusable for actual compute due to having a single core and only half a gig or RAM. They make for great beefy microcontrollers and single-purpose boards, but are not the kind of thing where you want to run various network services. (I have a cluster running Pi 2s, which have 4 cores apiece, but are still too short on RAM)

[deleted]

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

#157

Post by jng »

numpad0 wrote: post #125
jng wrote: post #75

Earlier quoted context omitted.

That's very interesting and explains a number of things. 4MB writes seems pretty high though as a minimum write block size, I've googled but can't find details among the sea of pages trying to sell me SD cards, won't you by chance have a reference? Thanks!

Google search for "microsd erase block size"[0] From a forum post in raspberrypi.org[1]: > My 16 GB SanDisk Extreme Pro 45 MB/s UHS 1 card reports an erase block size of 4 MB. > My 8 GB Transcend SDHC Class 6 150x card reports an erase block size of 4 MB. > My 2 GB Transcend SD 150x card reports an erase block size of 8 kB. . From another post from StackExchange.com[2]: > the data cannot be overwritten without being…

Thank you, very useful information. Makes complete sense for a media type initially designed to power cameras and audio and video recorders.

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

#158

Post by cptskippy »

paines wrote: post #153
cptskippy wrote: post #146

Earlier quoted context omitted.

> I'm not familiar with Singapore Singapore is a very small (~250 sq mile) country, so it would take less than 30 minutes to drive across. It's very wealthy. It has, almost dead center in the middle, an electronics mall called Sim Lim Tower that's like 10-20 stories tall. They most certainly have options.

And you forgot the superb food and it's variety.

I hope you're not referring to durian. :)

I was just pointing out characteristics that would lend themselves toward sourcing a network switch (e.g. accessible, wealthy, giant freaking electronics malls).

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