Anyone still using a raspberry pi 3

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BetelgeuseFive Project Donor
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Message 1904097 - Posted: 1 Dec 2017, 14:24:50 UTC - in response to Message 1904078.  

Speaking of Rpi's IIRC somewhere someone said the the version of BOINC on the Jessie Distro had some issue with one of the projects and it not doing work. If someone remembers can they let us know.

Jessie is the previous release and came with BOINC 7.4.23. The current release is Stretch and it comes will 7.6.33.

There is a later BOINC (7.8.3 currently) in Stretch-backports but the Raspberry Pi foundation don't have a backports repo so you have to use the Debian repo if you want it. I have heard reports that this one may have issues. I have used it on the Pi without any problems. Your mileage might vary...


I recently upgraded my 3 systems (2 * Model 2B and 1 * Model 3B) from Jessie to Stretch and added another Model 3B.
All 4 systems are running Stretch without issues. Hope new work is coming soon ...

Tom
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Message 1906420 - Posted: 11 Dec 2017, 14:08:48 UTC - in response to Message 1904012.  

Hello Chris

I'm using an open "case" that I got off amazon. It's really just two pieces of acrylic with four brass standoffs and the PI board held in between. The fan is located right above the processor and I have a heat sink installed.

Running seti on all four cores my CPU temp, as reported by the system, is usually around 59C.

As someone else replied, when I said "headless" I meant without keyboard or monitor attached.

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William
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Message 1909775 - Posted: 31 Dec 2017, 7:46:40 UTC - in response to Message 1890988.  

Using 5 Raspberry Pi 3s crunching SETI@Home 100% CPU time. I have them in a 3D printed rack and laid on their side with a big 24V fan pushing hair through each slot in the rack and keeping the CPU packet temperature at a nice chilly 38 degrees Celcius.

Works great, currently crunching almost 1500 average credit and am in the top 25% of average credit contributors.


Pictures? :)
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Message 1909792 - Posted: 31 Dec 2017, 9:48:36 UTC - in response to Message 1909775.  

Pictures? :)

Well I don’t know about him but I designed a 3D printed case to hold four side by side with active cooling. I am calling it the Pi ^4 (Pi to the Power of Four) case. I have done another version but am waiting on some parts before I can splash it all over the internet :-)

Pics of the prototype can be found here.
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Message 1924847 - Posted: 16 Mar 2018, 6:37:39 UTC

I recently upgraded my setup with RPi 3 B+

I made a small "cluster" consisting of 5 PIs:
1x RPi 3B
4x RPi 3

The main node is RPi 3B+ serving also as a file system server for rest of the nodes, so all client nodes are without SD card and boot with PXE over network.

photo: https://imgur.com/a/Qq6sz
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Message 1924866 - Posted: 16 Mar 2018, 11:56:20 UTC

For those that don't know the Raspberry Pi Foundation released the Pi 3 model B+ on the 14th of March. Its a bit faster (1.4GHz instead of 1.2GHz) and has better networking than the 3B (330 Mbit/sec plus dual-band WiFi). It also supports power over ethernet (PoE) by way of a PoE HAT module. Memory is still the same 1GB of DDR2.


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Message 1924912 - Posted: 16 Mar 2018, 17:11:44 UTC
Last modified: 16 Mar 2018, 17:12:12 UTC

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Message 1924948 - Posted: 16 Mar 2018, 22:03:50 UTC

Here are the BOINC benchmark results from a 3B and the 3B+

Rpi 3B
Number of CPUs: 4
975 floating point MIPS (Whetstone) per CPU
15364 integer MIPS (Dhrystone) per CPU

Rpi 3B+
Number of CPUs: 4
1123 floating point MIPS (Whetstone) per CPU
17834 integer MIPS (Dhrystone) per CPU

Over on Einstein I am seeing run times of approx 42,000 seconds for the 3B and 37,000 for the 3B+
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Message 1925059 - Posted: 17 Mar 2018, 15:20:33 UTC

MarkJ - Thanks for the benchmark stats.

Miroslav KUBIK - Nice cluster. With POE, it is nice and clean.
~Chris

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Message 1927039 - Posted: 29 Mar 2018, 8:25:26 UTC

I'm running a cluster of 25 3Bs. They seem to run in the 550 to 600 RAC.
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Message 1927423 - Posted: 31 Mar 2018, 1:57:45 UTC

Is it possible to have 1 raspberry pi hand out work units to the other raspberry pi's in a cluster? And have 1 computer account be the go-between of all of them in the cluster and SETI? So that the cluster would look like 1 PC to SETI?
~Chris

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Message 1927439 - Posted: 31 Mar 2018, 3:08:47 UTC - in response to Message 1927423.  

Is it possible to have 1 raspberry pi hand out work units to the other raspberry pi's in a cluster? And have 1 computer account be the go-between of all of them in the cluster and SETI? So that the cluster would look like 1 PC to SETI?

It is possible, but you will need to write the software to do it.
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Message 1936122 - Posted: 18 May 2018, 4:48:32 UTC - in response to Message 1890103.  

I’ve started running four Raspberry Pi 3 B+’s in the past few weeks. Don’t worry about me jumping to the top of the stats anytime so but it’s nice to know they’re doing something useful while I’m dreaming up things to do with them.

Each Pi is running pretty much the same projects and I started having some heating problems. All units now have heat sinks on the CPU, LAN, and RAM chips. One is in the path of an HVAC vent, two have single fans in the cases, and the one that’s still hot just has the sinks, no fans, no blower. All are at 100% CPUs using 60% of each one’s time. The hot one is throttling at about 75 °C.

As time allows, I’ll try to find just how hard I can push them. Probably will move the hot one to a cooler place in the house or maybe replace the case with one with a fan. I had bought a dual fan gizmo that was supposed to fit a 3 B+ but it doesn’t. Won’t quite clear the PoE connectors on top left and the edge of the camera connector on the center right.
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Message 1936136 - Posted: 18 May 2018, 12:12:21 UTC

Yep, I'm using two Pi 3 Model B+ at the moment and will have four running pretty soon. I'm putting together a little stack you can see the progress here -

https://setiathome.berkeley.edu/forum_thread.php?id=82884

They take from ~6 to ~ 16 hours depending on what kind of WU they get (Astropulse takes a long time), but of course they have 4 cores too, so each puts out a good workload. I think they do fine. They are racking up progress sitting there running 24/7, hey what more can you ask of a little computer. :-)

Here's the progress on the stack as of yesterday, two more to go -


I'm putting myself to the fullest possible use, which is all, I think, that any conscious entity can ever hope to do.
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Message 1936140 - Posted: 18 May 2018, 12:54:04 UTC

That's a nice tidy setup you've got there.
I assume that airflow is across the boards, and, if needed you could put a fan on one face to force it?
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Message 1936208 - Posted: 18 May 2018, 23:13:37 UTC - in response to Message 1936140.  

That's a nice tidy setup you've got there.
I assume that airflow is across the boards, and, if needed you could put a fan on one face to force it?

I was thinking the same thing.
Looking at the orientation of the heatsinks, put the stack of Pis in a rack or box with a large slow moving fan to blow air from the back to front (or reverse) too keep all of the units in the stack cool with the one large fan. No need for individual, high speed small fans.
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Message 1936222 - Posted: 19 May 2018, 0:47:36 UTC - in response to Message 1936140.  
Last modified: 19 May 2018, 0:49:33 UTC

That's a nice tidy setup you've got there.


Thank you.

I assume that airflow is across the boards, and, if needed you could put a fan on one face to force it?


Each section has it's own little 5V fan mounted above the processor blowing down onto the proc., so each Pi has independent cooling. You can see the fan on the top unit. Cool air can easily be drawn in from all sides of the smaller space between each major Pi assembly.

Today I mounted another Pi on top so now there are three. Tomorrow all four will be mounted, but only the top two will be running because I only have power supplies for two at the moment. I will take care of that by wiring up a custom set of cables all going to a master PS.

However, the Pi running at the top at the moment (utilizing 4 cores for this project), which is Pi-2 if you look at my computer list, is in a room at 27 C and the temp report for the proc. is 53.7 C, so I am satisfied with the cooling that the tiny fans are providing, at the moment.

However; if needed, more air could be introduced by another larger external fan blowing on the whole setup.
I'm putting myself to the fullest possible use, which is all, I think, that any conscious entity can ever hope to do.
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Message 1936533 - Posted: 21 May 2018, 13:46:48 UTC - in response to Message 1936222.  

Here is the final product w/custom built power cables going to that PS you see beside them. Four Raspberry Pis and 4.5 Amps of pure processing power! They all have Seti@home project credit now and make their own good progress. The only thing I have to add are some reset switches but that's just for convenience.


I'm putting myself to the fullest possible use, which is all, I think, that any conscious entity can ever hope to do.
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Message 1937398 - Posted: 27 May 2018, 15:44:53 UTC

Nice setup.
~Chris

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Message 1937626 - Posted: 30 May 2018, 1:13:59 UTC - in response to Message 1937398.  

Nice setup.


Thanks. Since starting this project a couple of weeks ago, the first Pi has over 10k credit now, the other three are coming along behind. Along with my other computing platforms, my goal is to get to a million credits total for my effort before the end of the year. According to my calculations, it should happen with what I have going now.

P.S. But I might get a wild hair and upgrade another PC to a Ryzen 7 1700 like I already have, which will assure my goal will be easily reached :-)
I'm putting myself to the fullest possible use, which is all, I think, that any conscious entity can ever hope to do.
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Message boards : Number crunching : Anyone still using a raspberry pi 3


 
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