[MPICH] Heterogenous cluster MPICH2

[Philip Sydney Lavers]

hello Irfan and Rob and folks

>
>Is it possible for you to verify if the same problem happens
when you 
>communicate between 2 sparc64's? If it does not then there
might be 
>endian issues with mpich2 implementation.
>
 
I have run out of computers that I have any control over. It
will take time to get others to install MPICH2 on other
machines which I may get an account on. One candidate is a Mac
G5, by the way. 

>It looks like you are trying to get proton and paul1 to talk
to each
>other.  sparc64 and athlon64 are different endian >architectures:

>http://www.mcs.anl.gov/web-mail-archive/lists/mpich-discuss/2005/06/msg00060.html

>Am I misunderstanding your problem?  

No - that is my problem, but I was only trying to assist Irfan.

"I'm allright Jack" because my own cluster is and will be
homogeneous - all AMD 64 bit processors.

I am surprised that MPICH2 cannot handle the endianess issue.

I installed MPICH2 because I need mpi, ultimately for
CRYSTAL03, and the "web talk" seemed to encourage MPI-2 in
preference to MPI. I bought the book "Using MPI-2" and wrote
my programmes with due recognition of the warnings about the
size of displacement units on page 147. This meant that I
could mix athlon 32 bit and athlon64 64 bit processors. I
simply assumed that endianess would be accounted for in the
same way - it is no problem in pvm.

regards,

Phil Lavers