6 ms·

Simple Raspberry Pi Rack

105 points by ausjke 14y ago

Lerc 14y ago
Seems like it's missing an opportunity for linking the speaker to mic plugs in a daisychain for a cyclic network(of admittedly limited functionality)
dewey 14y ago
And if you like to play with legos: http://i.imgur.com/75XSCWX.jpg http://i.imgur.com/75XSCWX.jpg http://www.lowendtalk.com/discussion/9372/colocating-my-raspberry http://www.lowendtalk.com/discussion/9372/colocating-my-rasp...
- hkmurakami 14y ago
  ooh I remember seeing this Lego rack. IIRC it's from a professor's computing project, with the rack built by his son?
  - hamdiakoguz 14y ago
    Original source: http://www.southampton.ac.uk/~sjc/raspberrypi/pi_supercomputer_southampton.htm http://www.southampton.ac.uk/~sjc/raspberrypi/pi_supercomput...
dmcg 14y ago
I like articles that put the hack back into Hacker News. In a similar vein - http://www.doctormonk.com/2013/02/raspberry-pi-and-breadboard-raspberry.html http://www.doctormonk.com/2013/02/raspberry-pi-and-breadboar...
- vixen99 14y ago
  "Does not exist"
stusmall 14y ago
Its a shame they don't support PoE. It'd make the whole thing a lot easier and cheaper
- ralph 14y ago
  AIUI, and you may know this, the reason they don't is it would make each Pi considerably more expensive.
ultimoo 14y ago
Very nice. However, do you have any ideas what can be accomplished with a multi-computer rack infrastructure that costs about $500? It is probably too weak to run virtualization (which racks are used for these days). It is also not trivial to set up cluster computing wherein these multiple computers can meaningfully share memory and computing resources. Many of us can afford a 7 computer rack for less than $500, but how do we use it?
- mctx 14y ago
  Dispy? http://raspberrypi.stackexchange.com/q/87/35 http://raspberrypi.stackexchange.com/q/87/35
- jjs 14y ago
  Idea: each Pi could be placed in some carrying case (with power, external sensors, e.g. GPS), and individually taken out in the field. Then, when the Pis are back home and networked together, they connect as a cluster and reconcile their individual data...
- rubyrescue 14y ago
  Erlang (or Elixir) runs really well on the Pi - and cross-node communication is brain-dead simple.
sstarr 14y ago
There's a link to this recent redesign at the bottom of the comments: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=40&t=41669 http://www.raspberrypi.org/phpBB3/viewtopic.php?f=40&t=4...
ck2 14y ago
USB 3.0 7-Port Hub for power That has to be the most expensive power supply workaround ever. Oh and part 2: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=40&t=41669 http://www.raspberrypi.org/phpBB3/viewtopic.php?f=40&t=4...
- zdw 14y ago
  I view it more as an novel solution. The Pi's power cable is Micro-USB, so buying things that interact with that standard rather than hacking up your own cables makes a bit of sense. That hub is $50 USD: http://www.amazon.com/Plugable-Power-Adapter-VL812-Chipset/dp/B008ZGKWQI http://www.amazon.com/Plugable-Power-Adapter-VL812-Chipset/d... So it works out to around $7 for each Pi, probably closer to $10/each with cabling, which is quite reasonable for a slickly put together setup. That hub also has a 4A power supply, which is probably needed for a few heavily loaded Pi's.
toyg 14y ago
I'm tempted to replace the 2-yr-old DreamPlug I use as backup server with a Pi. Does anybody know how long a Pi would last if left running 24/7 ?
- danarbaugh 14y ago
  I've been running a 512mb Model B for 8 months now as my home's server. I think it has been rebooted twice due to power failure.
pstuart 14y ago
That looks cool and all, but what does one do with a rack these things? How does it compare with a cluster of x86 CPUs on a processing/watt basis?
- GuiA 14y ago
  An example of use is for educational purposes, to initiate students to MPI programming etc.: http://www.southampton.ac.uk/~sjc/raspberrypi/pi_supercomputer_southampton.htm http://www.southampton.ac.uk/~sjc/raspberrypi/pi_supercomput...
IgorPartola 14y ago
Would anyone pay about $20/month to rent an RPi colocated somewhere in the states, along with a basic control panel (reboot, reinstall, virtual console access, etc.)? Something like a model B with a 16 GB SD card? Just curious if there is a market for this vs virtual servers.
- rdouble 14y ago
  $20/m is too high. There was another posting recently where a guy co-located his RPi (or Beaglebone?) for less than $20 total over a period of 18 months.
  - IgorPartola 14y ago
    $20 is what you would pay for a comparable Linode virtual server. You can also colocate your RPi for free in Amsterdam, but would you host anything serious there?
    - JosephRedfern 14y ago
      A $20 Linode Server would totally outperform a Raspberry Pi... you've got access to 8 Xeon cores vs 1 700MHz ARM6 chip.
  - Ecio78 14y ago
    https://news.ycombinator.com/item?id=5649317 https://news.ycombinator.com/item?id=5649317
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- deleted 14y ago
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105 points by ausjke 14y ago

Lerc 14y ago

Seems like it's missing an opportunity for linking the speaker to mic plugs in a daisychain for a cyclic network(of admittedly limited functionality)

dewey 14y ago

And if you like to play with legos: http://i.imgur.com/75XSCWX.jpg http://i.imgur.com/75XSCWX.jpg http://www.lowendtalk.com/discussion/9372/colocating-my-raspberry http://www.lowendtalk.com/discussion/9372/colocating-my-rasp...

hkmurakami 14y ago
ooh I remember seeing this Lego rack. IIRC it's from a professor's computing project, with the rack built by his son?
- hamdiakoguz 14y ago
  Original source: http://www.southampton.ac.uk/~sjc/raspberrypi/pi_supercomputer_southampton.htm http://www.southampton.ac.uk/~sjc/raspberrypi/pi_supercomput...

dmcg 14y ago

I like articles that put the hack back into Hacker News. In a similar vein - http://www.doctormonk.com/2013/02/raspberry-pi-and-breadboard-raspberry.html http://www.doctormonk.com/2013/02/raspberry-pi-and-breadboar...

vixen99 14y ago
"Does not exist"

stusmall 14y ago

Its a shame they don't support PoE. It'd make the whole thing a lot easier and cheaper

ralph 14y ago
AIUI, and you may know this, the reason they don't is it would make each Pi considerably more expensive.

ultimoo 14y ago

Very nice. However, do you have any ideas what can be accomplished with a multi-computer rack infrastructure that costs about $500? It is probably too weak to run virtualization (which racks are used for these days). It is also not trivial to set up cluster computing wherein these multiple computers can meaningfully share memory and computing resources. Many of us can afford a 7 computer rack for less than $500, but how do we use it?

mctx 14y ago
Dispy? http://raspberrypi.stackexchange.com/q/87/35 http://raspberrypi.stackexchange.com/q/87/35
jjs 14y ago
Idea: each Pi could be placed in some carrying case (with power, external sensors, e.g. GPS), and individually taken out in the field. Then, when the Pis are back home and networked together, they connect as a cluster and reconcile their individual data...
rubyrescue 14y ago
Erlang (or Elixir) runs really well on the Pi - and cross-node communication is brain-dead simple.

sstarr 14y ago

There's a link to this recent redesign at the bottom of the comments: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=40&t=41669 http://www.raspberrypi.org/phpBB3/viewtopic.php?f=40&t=4...

ck2 14y ago

USB 3.0 7-Port Hub for power That has to be the most expensive power supply workaround ever. Oh and part 2: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=40&t=41669 http://www.raspberrypi.org/phpBB3/viewtopic.php?f=40&t=4...

zdw 14y ago
I view it more as an novel solution. The Pi's power cable is Micro-USB, so buying things that interact with that standard rather than hacking up your own cables makes a bit of sense. That hub is $50 USD: http://www.amazon.com/Plugable-Power-Adapter-VL812-Chipset/dp/B008ZGKWQI http://www.amazon.com/Plugable-Power-Adapter-VL812-Chipset/d... So it works out to around $7 for each Pi, probably closer to $10/each with cabling, which is quite reasonable for a slickly put together setup. That hub also has a 4A power supply, which is probably needed for a few heavily loaded Pi's.

toyg 14y ago

I'm tempted to replace the 2-yr-old DreamPlug I use as backup server with a Pi. Does anybody know how long a Pi would last if left running 24/7 ?

danarbaugh 14y ago
I've been running a 512mb Model B for 8 months now as my home's server. I think it has been rebooted twice due to power failure.

pstuart 14y ago

That looks cool and all, but what does one do with a rack these things? How does it compare with a cluster of x86 CPUs on a processing/watt basis?

GuiA 14y ago
An example of use is for educational purposes, to initiate students to MPI programming etc.: http://www.southampton.ac.uk/~sjc/raspberrypi/pi_supercomputer_southampton.htm http://www.southampton.ac.uk/~sjc/raspberrypi/pi_supercomput...

IgorPartola 14y ago

Would anyone pay about $20/month to rent an RPi colocated somewhere in the states, along with a basic control panel (reboot, reinstall, virtual console access, etc.)? Something like a model B with a 16 GB SD card? Just curious if there is a market for this vs virtual servers.

rdouble 14y ago
$20/m is too high. There was another posting recently where a guy co-located his RPi (or Beaglebone?) for less than $20 total over a period of 18 months.
- IgorPartola 14y ago
  $20 is what you would pay for a comparable Linode virtual server. You can also colocate your RPi for free in Amsterdam, but would you host anything serious there?
  - JosephRedfern 14y ago
    A $20 Linode Server would totally outperform a Raspberry Pi... you've got access to 8 Xeon cores vs 1 700MHz ARM6 chip.
- Ecio78 14y ago
  https://news.ycombinator.com/item?id=5649317 https://news.ycombinator.com/item?id=5649317

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