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Subject: Re: [Boost-users] [Boost.MPI] question about serializingcustomobject
From: Matthias Troyer (troyer_at_[hidden])
Date: 2010-08-27 01:58:34

On Aug 27, 2010, at 2:05 AM, Robert Ramey wrote:

> 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.

MPI will take care of that for 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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