|
The Raspberry PI was a throw away computer, you find them being used in place of microcontrollers as they are easier to program(!). 
|
|
|
|
|
Now if this cluster was for the Pi Zero that would be something. Small, cheap and as far as I know available.
|
|
|
|
|
Programming them sucks though, and you'd have to find a way to network them.
Or you could use an ESP32 and its ESP-NOW wireless mesh to handle the traffic.
To err is human. Fortune favors the monsters.
|
|
|
|
|
Back in the days of DEC you could cluster there computers, was an awesome setup.
Too bad they went under, they were great machines.
|
|
|
|
|
HP still keeps OpenVMS alive. Somewhat unwillingly. They cancelled the Hobbyist Program again, so I can no longer get licenses for my systems.
Unsure whether or not the referenced technology is similar to a DEC cluster or more like a QNX cluster -- in which (if I recall correctly) you can essentially have one logical computer spread across multiple devices.
|
|
|
|
|
At one time I had thought about getting a uVAX but things happened and I got cast into another dimension so to speak.
|
|
|
|
|
|
The first uVAX I worked on was around 86,don'tremember the model, but quit the company not long after they got it and I moved to Florida to work on a PDP 11/23. Like going from a Cad to a Pinto!
|
|
|
|
|
I used PDP-11s in high school and some college, then VAX-11.
My co-op job in college was managing a MicroVAX 3600 -- their PDP-11 was sitting cold and unused by that time.
Then I used mostly VAX and Alpha until 2002. Just a hobbyist since then.
|
|
|
|
|
ditto mike. amazing os
"A little time, a little trouble, your better day"
Badfinger
|
|
|
|
|
Upgrading this site's hosting setup?
Did you ever see history portrayed as an old man with a wise brow and pulseless heart, weighing all things in the balance of reason?
Is not rather the genius of history like an eternal, imploring maiden, full of fire, with a burning heart and flaming soul, humanly warm and humanly beautiful?
--Zachris Topelius
|
|
|
|
|
A couple years ago I had set up a 3-rPi cluster where one was hosting an ngix server, ideally to route different domains coming in on the same public IP to different web applications, which was working great. The second rPi was the database server and had an external SSD connected to it, and the third rPi hosted the actual web apps. All was working, then a traumatic event happened in my life and the project and Code Project articles I had planned to write went to the wayside. It was sad. I hope I still can find my notes on how all this was configured when at some point I resurrect this project.
|
|
|
|
|
Look up Jeff Geerling on the various platforms - youtube. He has been reviewing different housing / backplane for the Pi family.
|
|
|
|
|
Well I'm pretty sure you can use OpenMPI on any Raspbian distribution but I think, alternatively, OpenCL is available on the Pi3 (and I heard Vulkan has parallelism, so you can use that on the Pi4).
In short, anything that would've required a cluster of 4 SGI workstations back in the day. Probably a cool, portable, quick and dirty render farm?
|
|
|
|
|
Southmountain wrote: What kind of projects can we do on this?
I would say that is exactly the question - why would you want to do that?
|
|
|
|
|
because this is a cluster, I am thinking to run some machine learning model to absorb a knowledge in a specific domain...
diligent hands rule....
|
|
|
|
|
How about calculating Pi? 
|
|
|
|
|
You could do data mining with an open source tool that can do parallelism to distribute the compute capabilities among all the cluster members. You could as well load balancing for Web Apps. Many posibilites limited by your imagination.
|
|
|
|
|
I'm all into the cluster thing - but that's a really big word technically. DEC had the tech for clustering. That said, negative feedback on the product - for $80 you get a frame you can plug boards into. Okay, I get that.
Where are the boards? The listing implies you get 4 boards, but I don't think so.
Many years ago, I worked in the land of VME. By definition - if you had a VME board, it adhered to that standard. Rolling out a product based on this, I would hesitate. Heck, most pi boards do quite well performance wise, so why do I need a cluster?
Charlie Gilley
“They who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.” BF, 1759
Has never been more appropriate.
|
|
|
|
|
Ugh, I'm looking for an uninterruptable power supply rated for my 1000W/15A PC and my ???W/???A 55" monitor because I've had a few power scares lately.
I bought one without checking the ratings, and it's useless. I'm probably going to give it away just because I don't want to deal with the return. It wasn't that expensive - about as expensive as it was useful.
I'm finding the difference between 1000W protection and 1500W protection is about $250 vs $550, and a huge size difference as well, and I have limited space.
I'm going to use one of those $30 power consumption monitors to see what my real world draw is when I'm not banging on my video card or CPU.
For the first time, I'm kind of longing for a relatively low power AMD system again, instead of my 180W TPD CPU and 320W TPD GPU. My power supply is rated @ 1000W / 15A, but I'm sure that's peak, but then again so is the rating on the UPS, unless I spend another $130 USD to get 1000W sustained output.
Anyone have a power hungry system on a UPS? What did you get?
To err is human. Fortune favors the monsters.
|
|
|
|
|
APC Backup-UPS Pro 1500VA. Looking on the APC site seems it's no longer available (model BR1500MS). They have however other models that might fit your needs.
Years of pain have taught me stay away from any UPS that is not APC. Might be a bit more expensive but quality is great and their service superb. In the end, if you pay a bit extra it gets amortized over the years of trouble free service.
Mircea
|
|
|
|
|
I hate to say this, but Amazon's reviews on APC's top end products are pretty negative. A lot of people having to have units RMA'd and replaced due to defect or otherwise complaining about performance or glitches.
Many of them are saying they used to rely on APC but it has went downhill.
You may have lucked out by having one of their older units, but those reviews make me uncomfortable. Other brands like cyberpower aren't coming up with reviews like that as much
To err is human. Fortune favors the monsters.
|
|
|
|
|
Your mileage may vary but I’ve been using APC units for the last 15 years (I think). Previous bad experience was with triplite and cyberpower. Had only one APC unit die on me (actually on my son) and they sent a replacement unit in 2 days. Cool thing is that you send the bad unit only after you get the new one. Saves you the hassle of finding package for the old one.
Mircea
|
|
|
|
|
My experience is similar to yours. I have 4 APC 1500's and they perform flawlessly (knock on wood), while I have had poor experiences with CyberPower and Triplite. All of my APC's are at least three years old.
I sold a Threadripper system a couple of months ago and tossed in an older APC unit (1350 I believe) that I had laying around. Too bad I could have sent the HCW for the cost of shipping.
|
|
|
|
|
If you want to level up from APC you have to go to Eaton.
Been using them to power server racks on several places. Been extremely reliable, but also a bit pricey.
Selection starts here: Backup Power UPS[^]
(Read the FAQ near the top of the page)
You probably don't need to bother with a standby UPS, but rather a Line-interactive or Online
If you go for standby you can just as well buy an APC.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
