The next release of ROMIO will hopefully fix this problem.
Rajeev
> Date: Sat, 30 Apr 2005 15:03:54 -0400
> From: David Cronk <cronk_at_[hidden]>
> Subject: Re: LAM: subarray data type
> To: General LAM/MPI mailing list <lam_at_[hidden]>
> Message-ID: <4273D69A.1060803_at_[hidden]>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> To follow up on this, if you do not already know, it is not that
> difficult to build the subarray data type by using type contiguous to
> define a row/column (row in C, column in Fortran) and then
> type vector
> to define the subarray, building on the contiguous datatype.
> This is,
> of course, for a 2-D array. It is a natural extension to arrays of
> higher dimension.
>
> I hope this helps.
>
> Dave.
>
> Jeff Squyres wrote:
>
> > Unfortunately, nothing has changed in this area -- ROMIO does not
> > support LAM's SUBARRAY datatype.
> >
> > On Apr 28, 2005, at 5:10 AM, Heiko Bauke wrote:
> >
> >> Hi,
> >>
> >> today I tried to use a subarray data type in MPI-IO. But
> all I got was
> >> the error message:
> >>
> >> Error: Unsupported datatype passed to ADIOI_Count_contiguous_blocks
> >>
> >> In the LAM mailing list archives I read in a post from
> 2003 that the
> >> error is originated by ROMIO and it is because LAM treats
> >> MPI_Type_darray and MPI_Type_subarray as first-class MPI-2 derived
> >> datatypes, whereas ROMIO assumes that these are built on
> top of MPI-1
> >> derived datatypes and this needs to be fixed in ROMIO.
> >>
> >> At the moment I am using LAM/MPI 7.0.6. Is there any
> chance that the
> >> problems with MPI_Type_darray and MPI_Type_subarray will
> be fixed in
> >> future LAM/MPI versions or Open-MPI?
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