rihoward1 at gmail.com
rihoward1 at gmail.com
Wed Sep 12 23:42:42 EDT 2012
I see you already found a mention of MPICH2 . Coincidentally was going suggest this coming Saturday as something to demonstrate at OLPC-SF.
I know it is outside the scope of OLPC but it would be interesting to see what this type of message passing interface could do on a group of XOs.
On Sep 12, 2012, at 9:22 AM, Sameer Verma wrote:
> Something like this: http://paritynews.com/hardware/item/302-engineers-build-supercomputer-using-raspberry-pi-lego
> On Sep 11, 2012 10:43 PM, "Sameer Verma" <sverma at sfsu.edu> wrote:
> On Tue, Sep 4, 2012 at 9:43 PM, John Watlington <wad at laptop.org> wrote:
> > On Sep 4, 2012, at 10:47 PM, Sameer Verma wrote:
> >> Hi gang!
> >> http://blog.laptop.org/2012/09/04/are-you-working-with-xo-laptops-that-need-an-upgrade/
> >> So, is there a minimum number of motherboards that one has to buy?
> >> Pricing?
> > Both answers should be available from the email listed in the blog:
> > countries at laptop.org.
> >> Any other details?
> > We've supported this from the beginning by design. Kits have been available
> > as spare parts for deployments to purchase. Upgrading an XO-1 to an XO-1.5
> > or higher motherboard requires the insertion of a small metal bracket to hold the
> > WLAN card. The XO-1.5/1.75 chassis are mechanically identical.
> > Upgrading an earlier laptop to an XO-4 motherboard will require a
> > small rubber piece inserted to change the size of one chassis hole
> > from USB to micro HDMI.
> > Unfortunately, the mechanics of XO-4 Touch mean it cannot be retrofitted.
> > You can get the higher performance by upgrading to an XO-4, but sadly
> > no multi-touch support.
> > A kit includes all the parts needed to upgrade a particular laptop model. In
> > addition to a motherboard (if XO-4 with an internal connector missing)
> > this generally includes a new heat spreader, a WLAN card (if needed), and
> > conductive foam/tape as needed to improve the ESD shielding of the earlier
> > chassis. We do perform some testing of older laptops upgraded to each
> > new motherboard design in order to construct appropriate upgrade kits.
> > Cheers,
> > wad
> Thanks for the details.
> I was walking through a replacement workflow in my mind for my Jamaica
> and India projects, and I realized that if/once the upgrades are done,
> one would be left with several older working motherboards. What's to
> become of these? If someone could design a chassis to hold a bunch of
> boards together...imagine a Beowulf cluster of these! (sorry, couldn't
> "Is that a lunch box? No, it's my Beowolf cluster. Can I compute
> something for you?"
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> Devel at lists.laptop.org
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