[SciPy-user] running scipy code simultaneously on several machines

Robert Kern robert.kern@gmail....
Sat Oct 13 23:54:06 CDT 2007


Kurt Smith wrote:
> On 10/12/07, Brian Granger <ellisonbg.net@gmail.com> wrote:
>> Mentioned below by Jarrod, IPython1 is probably the best solution for
>> this.  Here is the simplest parallel implementation in IPython1:
>>
>> In [1]: import ipython1.kernel.api as kernel
>>
>> In [2]: rc = kernel.RemoteController(('127.0.0.1',10105))
>>
>> In [3]: rc.getIDs()
>> Out[3]: [0, 1, 2, 3]
> 
> Hi all:
> 
> I installed everything to ipython1's liking, and here is what I get
> running the above code:
> 
> ksmith@laptop:~/Devel/python/ipython1
> [183]$ ipython
> Python 2.5.1 (r251:54863, Sep 21 2007, 22:12:00)
> Type "copyright", "credits" or "license" for more information.
> 
> IPython 0.8.2.svn.r2750 -- An enhanced Interactive Python.
> ?         -> Introduction and overview of IPython's features.
> %quickref -> Quick reference.
> help      -> Python's own help system.
> object?   -> Details about 'object'. ?object also works, ?? prints more.
> 
> In [1]: import ipython1.kernel.api as kernel
> 
> In [2]: rc = kernel.RemoteController(('127.0.0.1',10105))
> 
> In [3]: rc.getIDs()
> [snip traceback]
> ConnectionError: Error connecting to the server, please recreate the client.
> The original internal error was:
> error(61, 'Connection refused')
> 
> I'm sure it's something really simple, but I don't know what.
> Pointers?  I'm on a MacBook, 10.4.10, python 2.5.1, ipython1 from svn.
> 
> Thanks for any help you can give -- googling turned up nothing.

You have to start up the remote interpreters first. Use the ipcluster script
that comes with ipython1. Here is the tutorial documentation:

  http://ipython.scipy.org/moin/Parallel_Computing_With_IPython1

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco


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