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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Someone has done a fairly large (64 nodes) cluster of raspis.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Computationally, it’s not a great solution in a GFLOPS/Watt or GFLOPS/money sense.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">OTOH, if you wanted to have a class assemble toy clusters, the hardware cost is fairly low.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I might choose a BeagleBone Black instead of a raspi, but that’s purely a personal preference – it took me less time to get my BBB up and running (<1 hr from
opening the box) than the raspi (half a day, mostly trying to get a bootable image together in a Windows environment).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I think there is some significant pedagogical value in actually bringing up a cluster from scratch and dealing with sysadmin issues like assigning IP addresses,
how you push software to the nodes, etc. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">One problem with the “cheap and cheerful” boards is that the boards are easy, but you need power supplies, some sort of way to manage the hardware (although “spread
out on the table top” is fine at first, but, please, get an ESD mat and wear a wrist strap…)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The other problem is getting visible output – you could spend more on displays, cables, KVM, than on the computers.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">If you could find inexpensive $100 laptops, that might be a better starting point. They have a keyboard, a display, a power supply, etc. You can get recertified
HP laptops for <$90 from newegg.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">If you’re a glutton for punishment, you could use WiFi for the networking..<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Jim Lux<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">(818)354-2075 (office)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">(818)395-2714 (cell)<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Beowulf [mailto:beowulf-bounces@beowulf.org]
<b>On Behalf Of </b>Jonathan Aquilina<br>
<b>Sent:</b> Saturday, May 14, 2016 11:45 PM<br>
<b>To:</b> Carlos Linares Lopez <clinares@inf.uc3m.es><br>
<b>Cc:</b> beowulf@beowulf.org<br>
<b>Subject:</b> Re: [Beowulf] recommendations on ARM distro?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">What is everyone's thoughts on raspi's for a cluster?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"> <o:p></o:p></span></p>
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<p><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"> <o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">On 2016-05-12 21:58, Carlos Linares Lopez wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">My first e-mail in the list, ...something I finally understand! :)<br>
<br>
I have a small cluster of 3 odroid u3 running Unbuntu 14.04 LTS (I do<br>
have to update it these days to 16.04). I use condor and it works very<br>
nicely<br>
<br>
You can see a short demo here: <a href="https://www.youtube.com/watch?v=t4QPX50u4rg">
https://www.youtube.com/watch?v=t4QPX50u4rg</a><br>
<br>
<br>
<br>
El 12/5/16 a las 21:09, C Bergström escribió: <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">On Fri, May 13, 2016 at 2:59 AM, Mark Hahn <<a href="mailto:hahn@mcmaster.ca">hahn@mcmaster.ca</a>> wrote:
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">Hi all,<br>
we have a (tiny) experimental ARM box - based on Cavium ThunderX, but have<br>
run into basic issues with distros (ie, ARM+ldap+ubuntu=fail).<br>
<br>
If you're using ARM (on something bigger than a RPi), what distro are you<br>
using?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">I don't have 1st hand experience with the combination you're<br>
referencing above, but peanut gallery comments<br>
<br>
1) I'd encourage you to retry the default Cavium provided OS - I<br>
realize that the package manager may not be fun, but they have thus<br>
far been good about software support for our needs<br>
<br>
2) Fedora has put quite a bit of effort into their AArch64 distro<br>
------------<br>
I'm happy to connect you to people @ARM or @Cavium which is likely a<br>
better support channel for critical software like this.<br>
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