eh true la        hahaaha. was too excited and didn't read properly. lol.

web server ?

I have a cluster of 32 + 1 Pi...  Proof of concept for distributed processing problem such as calculating pi number.

Here you go... MPI based. Maybe going to try different framework later 

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Hahaha

It's academic + hobby. Ultimate satisfaction 

Hahaha

It's academic + hobby. Ultimate satisfaction 

Nice setup...want to let one go?

BTW....your exposed conductors on the power connector does pose a shock risk. Be careful.

Nice    Yah, some program doesn't benefit much after a certain amount of node being used, but some do. I'm still exploring, but my rig had been sitting idle for some time. Too busy 

what usb wifi dongle do you guys use?
any that is compatible out of the box with RPi 2 & Raspbian Wheezy?

do i must use the one built specifically for RPi because i read somewhere that the USB ports doesn't provide enough power for common dongle.
anyone can clarify this?

hi, wanna ask how to use LAN connect the raspberry pi from OSX? from what i get from internet, they said OSX wil automatically assigen the Rpi an IP, but my raspberry  does not get any ip. any solution?

yup.. LAN to Rpi, then SSh form OSX, because mine one is headless Rpi, so when wifi is not available, i still can ssh buy LAN directly to it.

Tried, but no working...is it because the RPi is running both eth0 and wlan0 at the same time? because i need wifi to ssh into RPi, when setting up the eth0 from OSX.

But the wifi in RPi is connected, is this reason it fail to get ip from osx?
i tried to ifdown and up the eth0, i saw it requesting ip through 255.255.255.255, is this normal? because the OSX self assigned ip (on OSX) is something like 169.254.XXX.XXX

Tried before...and it is no problem to get ip when connect it to router, so maybe osx side need to set something?but so far i only can check the internet sharing, nothing much i can do.

Try and run your parallel program and run top. Look for wa and if it is high then IO is the issue in your setup(I guess IO should be the main issue for distributed or parallel for nodes in the same network)

here is the setting.... just check the sharing option only..
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for your 2nd one, when you wanted more accuracy, everything takes a longer time to complete. but eventually as you add more nodes your issue should still be on IO, because as you can see from the prime num test, when the requests is faster, the possibility of each node sending data back to the server at the same time is higher, so if your server node still runs on sd card, or even worse usb thumb drive(for storage of data), you should consider using a normal computer(desktop/laptop) or at least run raspi with HDD as the server node to solve the io issue and you should see a better result.

btw, you should plot it with nodes/time taken, because let's say you have 6 threads, I don't know if you're giving node 1 and spawn 5 threads and node 2 spawn 1 thread or node 1 2 threads, node 2 2 threads, node 3 2 threads, and the combination etc.

I believe this is some academic research stuff for uni/company? 

wow didn't know there's so many rpi users here!
i'm a noob to rpi, just recently bought a rpi2 and load up raspbian into it.
at the moment i'm using it for torrenting (transmission), file sharing, and my personal cloud storage (owncloud).

not sure what other stuff i can put on it yet...is there any central page for all the uses you guys use for your rpi2?

something like having a first page with some of the popularly used functions from the users here on their rpi2

i believe so, since there's even dedicated OS for media box haha!
but i mainly use it for torrenting since it's a low power device, better than running my rig just for torrenting.