[MPICH] MPICH 1 or 2: heterogeneous data representation?

[Matthew Chambers]

You are definitely going to need heterogeneous support.  64 bit/32 bit is
enough to cause that, and I don't even know what the type sizes are on the
Alpha machine (or the endianness for that matter).  All the Intel machines
at least are little endian.

> -----Original Message-----
> From: owner-mpich-discuss at mcs.anl.gov [mailto:owner-mpich-
> discuss at mcs.anl.gov] On Behalf Of Rob
> Sent: Friday, April 20, 2007 12:57 AM
> To: mpich
> Subject: [MPICH] MPICH 1 or 2: heterogeneous data representation?
> 
> 
> Hello,
> 
> I'm about to configure a cluster system with:
>   master = Intel/Xeon Pentium4
> 
>   nodes =
>       Intel/Xeon 32 bits
>       Intel/Itanium 64 bits
>       Alpha/Ev65
> 
> *ALL* of these machines run Linux CentOS 4.4.
> 
> Now, I don't know whether "heterogeneous data
> representation" is an issue here, because they
> are all running the same OS.
> Is the OS or the hardware relevant?
> 
> Hence I don't know whether to choose MPICH1 or
> MPICH2.
> 
> Thanks for help!
> 
> Rob.
> 
> 
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