[yt-users] Hop in parallel?

Michael Kuhlen mqk at astro.berkeley.edu
Fri Feb 24 17:49:25 PST 2012


> This just leaves the parallelHF too-short-iterator, right?

Weird, I no longer get the iterator error. Must have been some kind of
fluke. Sorry for the noise.

Cheers,
Mike


On Fri, Feb 24, 2012 at 5:17 PM, Matthew Turk <matthewturk at gmail.com> wrote:
> Hi Mike,
>
> This just leaves the parallelHF too-short-iterator, right?  That error
> in this context means that an exception was thrown in the iterator.  I
> wasn't able to reproduce it on your dataset ... if you change it to be
> expaned rather than an iterator, it should show where and what the
> exception is.
>
> -Matt
>
> On Fri, Feb 24, 2012 at 8:10 PM, Michael Kuhlen <mqk at astro.berkeley.edu> wrote:
>> Same here. Thanks for the quick fix.
>>
>> Mike
>>
>>
>> On Fri, Feb 24, 2012 at 4:31 PM, Geoffrey So <gsiisg at gmail.com> wrote:
>>> That fixed it for me, I get identical haloes now running HOP in serial and
>>> parallel from the 64 cube test dataset.
>>>
>>> From
>>> G.S.
>>>
>>>
>>> On Fri, Feb 24, 2012 at 4:20 PM, Stephen Skory <s at skory.us> wrote:
>>>>
>>>> Hi Mike,
>>>>
>>>> I think I've fixed the original HOP problem you had. It's in my yt branch
>>>> here:
>>>>
>>>> https://bitbucket.org/sskory/yt/overview
>>>>
>>>> could you try with the HOP (HaloFinder) with the new changes? Let me
>>>> know, and if it works for you, it will go into the main branch.
>>>>
>>>> With regards to your new problem, I tried the same swap of methods of
>>>> calculating "total_mass" that we did in the HaloFinder, but I think
>>>> there's something screwy going on with  .quantities, and I haven't
>>>> been able to track it down yet.
>>>>
>>>> With regards to speed, in general HaloFinder will be faster on all
>>>> datasets than parallelHF for datasets that HaloFinder can handle. But
>>>> HaloFinder is limited by the size of the dataset and by the cosmology
>>>> of the dataset (small cosmologies mean that a large padding is needed
>>>> when running in parallel, and this will defeat the point of
>>>> parallelism).
>>>>
>>>>
>>>> --
>>>> Stephen Skory
>>>> s at skory.us
>>>> http://stephenskory.com/
>>>> 510.621.3687 (google voice)
>>>> _______________________________________________
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>>>
>>>
>>>
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>>
>>
>>
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*  Dr. Michael Kuhlen              Theoretical Astrophysics Center  *
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