LAM: Errata Corrige - little endian - big endian conversion...

Hi everybody,

I got one doudt in LAM-MPI. Suppose, if 
i 
run the 
application on different systems with different data formats
(little-
endian & big endian)...Willl LAM-MPI converts from
little 
endian 
to 
big-endian(if it is sending data from for eg, Linux Pc &

Solaris)....

If it isn't able to do this, it will be able in the 
future releases? 
(is in your to do list?)

Thanking u for ur response,

A.A. Isola 
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Hi,

Recent versions of LAM/MPI (7.x) provide a transparent
optimized 
conversion between little and big endian machines. On older
versions 
there was an option in mpirun to toggle the conversion
on/off. I used 
this feature extensively betwen RS6000/AIX and PC/Linux.
However be 
aware of two caveats:

- use the SAME version of LAM/MPI on both platforms

- build both LAM/MPI libraries with the same default integer
length. On 
64-bit architectures you may be tempted to define integer*8
as the 
default (-i8), however this  breaks the communication with a
32-bit 
LAM/MPI library, probably because the signaling packets
don't match in 
size.

Pierre V.

PS. I see you have asked the same question for OPEN/MPI.
When I checked 
(few months ago) this was not the case.



Eng. A.A. Isola wrote:

>Hi everybody,
>
>I got one doudt in LAM-MPI. Suppose, if 
>i 
>run the 
>application on different systems with different data
formats
>(little-
>endian & big endian)...Willl LAM-MPI converts from
little 
>endian 
>to 
>big-endian(if it is sending data from for eg, Linux Pc
& 
>Solaris)....
>
>If it isn't able to do this, it will be able in the 
>future releases? 
>(is in your to do list?)
>
>Thanking u for ur response,
>
>A.A. Isola 
>_______________________________________________
>This list is archived at http://www.l
am-mpi.org/MailArchives/lam/
>  
>


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