Re: [Boost-users] [Boost.MPI] question about serializing custom object

Subject: Re: [Boost-users] [Boost.MPI] question about serializing custom object
From: Cristobal Navarro (axischire_at_[hidden])
Date: 2010-08-26 14:40:58

>
>
>
> Actually the answer is yes. This is exactly what is done by Boost.MPI!
>
> When you send an object using Boost.MPI, it is serialized into an MPI
> buffer by the packed_oarchive. Then that buffer's content is sent via MPI
> and it is unpacked at the other end. All this is transparently done by the
> send and recv calls of Boost.MPI.
>
> Matthias, so is possible to create this packed_oarchive for sender process,
and packed_oarchive for receiver process and use plain MPI instructions
MPI_send MPI_recv.

i think im getting the idea, i just need an example i could look at and
understand the silly parts to connect everything
thanks for all the help really

>
> > Feel free to contribute one.
>
> No need since it already exists.
>
> >
> > If I had nothing else to do, I would
> >
> > a) make a stream_buf which uses MPI
>
> > b) use binary_iarchive and binary_oarchive with this new stream_buf
>
> we avoid streambufs by directly packing using detail::mpi_[io]primitive.
> This allows us to make use of conversion facilities in MPI, rather than
> packing as native binary.
>
> > c) open one program with binary_oarchive and the other with
> binary_iarchive
>
> we call them packed_oarchive and packed_iarchive
>
> > d) do ar << on one end and ar >> at the other
>
> That is what the send and recv functions do, but in addition we have the
> MPI_Send and MPI_Recv calls that transfer the buffer.
>
> Matthias
>
>
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