[mpich-discuss] MPI I/O

[Gus Correa]

Hmm ...

I guess that if you are trying to read integers/int,
the file should have integers in binary representation,
not the digits/characters that represent the integers in plain text.

Have you tried to write a little C program to write
this group of integers to a (binary) file,
then use your MPI program to read this (binary) file?
I am pessimistic that this would work directly with the text file.
Too many hurdles: newline separators,
conversion from string to integer, etc.

Actually, a couple of questions to the MPICH2 developers:
Are text files readable at all by the MPI I/O functions?
Perhaps as characters, with the target buffer being of MPI_CHAR type?

The documentation I could find is vague, doesn't tell explicitly
which file types are supported by MPI I/O.

Thank you,
Gus Correa

Irfan Gul wrote:
> Hi,
> I need a simple program to read integer values from text file by 
> multiple processes?
> each process store n/p values in array.
> for example text file have n values like.
> 4
> 2
> 7
> 4
> 9
> 6
> 3
> 1
> ..............................................................
> thanks
> 
> Regard: Irfan
> 
> 
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