[ExeterLUG] December 13th details

Wed Nov 20 16:52:59 UTC 2013

Cool, thanks Rick,

I'll do some instructions on setting up the card and a quick intro to the idea of message passing interface (mpi) clusters etc for the project page...  

Malcolm

-------- Original message --------
From: "Rick.Timmis" <Rick.Timmis at Abazander.com> 
Date: 20/11/2013  13:54  (GMT+00:00) 
To: m.dinsmore at btinternet.com,exeter at mailman.lug.org.uk 
Subject: Re: [ExeterLUG] December 13th details 

HI Malcolm

I Willpost this up to ExeterrLUG site in Projects. 
Send me alink to ther card image when its ready

Ceerrs

All the best

Rick

Sent from Samsung tablet

Malcolm Dinsmore <m.dinsmore at btinternet.com> wrote:
Hi Paul,

Answering from my phone, apologies to those to whom it matters to for top posting...  

Thanks for the suggestions, I can host the image on my drop box and make it public,  that way it's not using up the lug's bandwidth.  But no problems with it being on the lug website either.

Malcolm

-------- Original message --------
From: Paul Sutton <zleap at zleap.net> 
Date: 20/11/2013 11:58 (GMT+00:00) 
To: Exeter LUG Mailing List <exeter at mailman.lug.org.uk> 
Subject: Re: [ExeterLUG] December 13th details 

On 20/11/13 11:23, Malcolm Dinsmore wrote:
> On Mon, 2013-11-18 at 15:58 +0100, Rick Timmis wrote:
>> I have updated the website with the details for the December meeting.
>>
>> Over to Malcolm for the Beowulf stuff.
>>
>
> Hi Rick et al...
>
> I'm working on getting a complete SD card image with a version of arch
> linux and the open source mpich software installed and some programs
> that we can run on it.  I've tested it with three nodes, I just need
> to put some finishing touches to this image which I hope to complete
> by the weekend so I can make it available well before the next meet
> (the SD card image will be about 180 mb tar.gz file and is 2GB
> expanded). 
>
> The requirements for the cluster are:
>
> Network Switches (we have 2 x 24 port I believe)
> A number of Trailing extension leads ( I can bring a 2 x 4 port)
>
> As many pies as we can muster!  Each Pi needs
>         a blank SD Card (at least 2Gb) loaded with cluster image  (I
> have enough for the three pies I can bring and 1 spare)
>         a network cable (I can provide at least 5 spares)
>         a UK micro usb power supply
>
> For the control Pi station I will bring an screen and keyboard though
> we could do that via SSH.
>
> It probably makes sense to put a name label on all the items that you
> bring. 
>
> Over on the DCGLUG mailing list there was a discussion about RPI
> clusters, apologies that I missed it at the time... I use a filter for
> the DCGLUG messages to keep them out of my inbox, because the
> discussion was tagged with the DCGLUG subject heading it got filtered
> and I missed it!
>
> Gordon is correct: I regard this as an academic exercise to learn
> about parallel computing.  We will probably need to have about 20 Pies
> to make a cluster with the same power as a PC.  It would be cool if we
> could get enough Pies together to beat my laptop.
>
> The Monte Carlo method of Pi calculation  lends itself to being done
> on a cluster since it involves repeatedly doing small independent
> actions that are aggregated and it's not important which order the
> actions are aggregated.
>
> With regard to Rick's suggestion of bit coin mining, I'm not sure that
> is practical on a Pi Cluster and probably not one that is so temporary
> as ours will be.  I'm assuming we can put the cluster together in an
> hour or so and run it for the rest of the evening then it will be
> dismantled.
>
> I hope to post more details early next week.
>
> Thanks for your interest,
>
> Malcolm
Hi

Excellent work here Malcolm,  I will try and collate some of this info
on the dcglug website (regarding what is needed etc) and we can provide
a link or maybe even host the image (if word press will let us do that).
Gordon is this possible,  ?  I think if saved as a tar.gz file it should
be fine to upload.

Rick - if there are some funds free could the lug buy some of the sd
cards,  I have sd card labels,  if we could then keep a set of ready
built cluster sd cards in our box,  then if we want to re-visit the
project at a later date we can do, as in say Jan Meeting or perhaps if
we wanted to use the project at a pi jam.

Paul

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