Think in terms of src and dst args in a move operation...

In a *read* operation, file_space represents the source data (size and shape) 
_selection_ and mem_space the destination data (size and shape).

Here is a detailed description...

http://davis.lbl.gov/Manuals/HDF5-1.8.7/UG/12_Dataspaces.html



"Hdf-forum on behalf of Landon Clipp" wrote:

Hello everyone,
Can someone please inform me what the difference is between memspace and 
filespace? I am looking at H5Dread which is defined as:

herr_t H5Dread( hid_t dataset_id, hid_t mem_type_id, hid_t mem_space_id, hid_t 
file_space_id, hid_t xfer_plist_id, void * buf )
For everything I've done so far I've just set the file_space_id to H5S_ALL. The 
API description discusses a little bit about file and memspace but I don't 
understand what the difference between them is. Thanks.
Regards,
--
Landon Clipp

National Center for Supercomputing Applications
BS Computer Engineering Student
University of Illinois Urbana-Champaign
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