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Subject: Re: [Boost-users] [Boost.MPI] question about serializingcustomobject
From: Robert Ramey (ramey_at_[hidden])
Date: 2010-08-26 20:05:41

Dave Abrahams wrote:
> BoostPro Computing,
> Sent from coveted but awkward mobile device
>> If one were using heterogenious machines, I could understand the
>> usage of MPI types. But as I understand it, the MPI serialization
>> presumes that the machines are binary compatible.
> You're mistaken.
>> So I'm just not seeing this.
> Start reading here:
> and all will be revealed

lol - I've read that several times. I just never found it to be very
revealing. The word skeleton seemed pretty suggestive. It's still not clear
to me how such a think can work between heterogeneous machines. For
example, if I have an array of 2 byte integers and they each need to get
transformed one by one into a 4 byte integer because that's closest MPI data
type, I don't see how the fact that the "shape" doesn't change helps you.
So when I read the documentation I didn't find an obvious answer to this
question. Admitadly my attention span is pretty short when I'm looking at
something just because I'm curious rather than really needing a solution to
my problem. So maybe its OK if one has more time to spend on it.

Robert Ramey

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