[IPython-dev] finding the number of available engines

Satrajit Ghosh satra at mit.edu
Wed Jan 19 15:00:52 EST 2011


thanks min.

cheers,

satra


On Wed, Jan 19, 2011 at 2:42 PM, MinRK <benjaminrk at gmail.com> wrote:

> mec.queue_status() returns a list of the form:
> [
>   (0, { 'pending' : "execute('a=5')", 'queue' : [ job1,job2,...] } ,
>   (1, {'pending' : 'None', 'queue' : [] },
>   ...
> ]
>
> In this case, engine 1 is idle.  I don't know why 1's pending is 'None'
> instead of None, that seems to be a bug.
>
> So you can see the idle engines with something like:
>
> def idle_engines(mec):
>     """return list of engine_ids corresponding to idle engines."""
>     qs = mec.queue_status()
>     engines = []
>     for e_id, status in qs:
>         if status['queue']:
>             continue
>         if not status['pending'] or status['pending'] == 'None':
>             engines.append(e_id)
>     return engines
>
> Which would return a list of engine_ids that are idle, the length of which
> would of course be the number of idle engines.
>
> -MinRK
>
>
> On Wed, Jan 19, 2011 at 10:39, Satrajit Ghosh <satra at mit.edu> wrote:
>
>> hi brian and min,
>>
>> i would like to do something like this:
>>
>> if num_engines_available() > 2:
>>     do_x
>> else:
>>     do_y
>>
>> in 0.10.1 series is there an easy way to query how many idle engines are
>> available?
>>
>> cheers,
>>
>> satra
>>
>>
>> _______________________________________________
>> IPython-dev mailing list
>> IPython-dev at scipy.org
>> http://mail.scipy.org/mailman/listinfo/ipython-dev
>>
>>
>
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