[mpich-discuss] MPI_File_set_view Error: ADIOI_Count_contiguous_blocks

[Ingo Bojak]

Rob Ross wrote:
> Thanks Ingo; I think that will do the trick for you. Sorry you ran 
> into this. -- Rob
Just to provide feedback: indeed it worked with the struct. I added in 
each rank a MPI_LB with 0 offset at the beginning and MPI_UB with "total 
length of window in bytes"  at the end to my series of  MPI_DOUBLE blocks.

One more question perhaps: The file is being only written to by all 
ranks (no read), in sequential order (one window after the other, with 
each rank writing to different parts of one window via the fileview) and 
collectively (MPI_File_write_all). I know how much each process writes 
every time (as is specified also by the fileview). I wonder if it is 
then advantageous to provide hints with INFO? I'm particularly thinking 
of "collective_buffering", but I do not quite understand what values the 
different "cb" variables would have to be set to...

Best,
Ingo