[MPI3-IO] Topics for discussion for the I/O working group slot

Quincey Koziol koziol at hdfgroup.org
Mon Feb 25 17:33:50 CST 2013

On Feb 25, 2013, at 5:09 PM, Dries Kimpe <dkimpe at mcs.anl.gov> wrote:

> * Quincey Koziol <koziol at hdfgroup.org> [2013-02-25 16:08:47]:
>> I was thinking more about this, and what about the "group collective"
>> I/O operations that we've kicked around a bit?  (Where "group
>> collective" is a sub-group of the processes that opened the file)
> Or the alternative: a subgroup-open which can quickly generate a handle
> for a subgroup given the handle for the larger group.

	This would be fine, as long as it was fast - I would expect that the subgroup-opened file handle would only exist for a single HDF5 I/O call (read or write).


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