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

Mohamad Chaarawi chaarawi at hdfgroup.org
Mon Feb 25 17:34:44 CST 2013

Hi Quincey/Dries,

On 2/25/2013 5:09 PM, Dries Kimpe 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.

Yes i like that better than copying and modifying the entire I/O 
operations. I don't imagine the sub-group open is a real file-system 
open (right?) so it should be lightweight?


>    Dries
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