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Update protocol.rst #113

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Update protocol.rst #113

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wfspotz
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@wfspotz wfspotz commented Jun 30, 2014

I was reading through this in detail in order to design a PyTrilinos adaptor, and found some changes I wanted to make.

One question: a 'dim_data' tuple of length greater than one, where one or more of the dimension dictionaries has a 'dist_type' of 'u' would represent a structured array of unstructured dimensions. I am not aware of any uses cases for this configuration. Are you supporting it? I would be OK with a constraint that if 'dist_type' == 'u', then len(dim_data) = 1 must be true.

I was reading through this in detail in order to design a PyTrilinos adaptor, and found some changes I wanted to make.

One question: a 'dim_data' tuple of length greater than one, where one or more of the dimension dictionaries has a 'dist_type' of 'u' would represent a structured array of unstructured dimensions.  I am not aware of any uses cases for this configuration.  Are you supporting it?  I would be OK with a constraint that if 'dist_type' == 'u', then len(dim_data) = 1 must be true.
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kwmsmith commented Jul 2, 2014

We do have usecases for arrays with a mixture of unstructured and structured dimensions. And down the road, we may want to allow individual dimensions to be unstructured for use with fancy indexing in a specific dimension.

Why can't PyTrilinos's adapator raise an exception if it gets a distributed array it can't handle?

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