[Paraview] Parallel MB reader

[Andy Bauer]

If I understand you correctly I think you need to do 2.  Each process should
have the same multiblock structure and will just not contain a data set for
the leaves that are assigned to a different process.  Check out
http://www.vtk.org/doc/nightly/html/classvtkMultiBlockDataSet.html#details

HTH,
Andy

On Tue, Jun 28, 2011 at 5:38 AM, Adriano Gagliardi <agagliardi at ara.co.uk>wrote:

>
> I've run into an issue when writing a parallel reader for partitioned files
> containing multi-block data. All data reads in fine on each process and
> works as expected, except for one thing. Since each partition only knows
> about the blocks it contains (and not the global blocks), I've not been
> able
> to have all the blocks available in the entire data-set available to the
> user. What I get instead is the list of blocks read in by the last data
> reader. I've got a couple of ideas to resolve this issue.
>
> (1) Have some sort of communication between each of the PV processes to
> ascertain which process has which data
>
> (2) Have the number of blocks stored on each process the same as the global
> number of blocks, but just allocate data to the blocks that each
> partition/process has data of.
>
> So, my questions are:
>
> (1) Is item (1) possible and, if so, what class(es) should I be looking at
> to do it
>
> (2) Will item (2) alone solve my issue, or will I run into problems whereby
> if block 0 has 50% of its data on partition 0 and the rest on partition 1
> that, after reading in, I will only ever see 50% of block 0 being whichever
> of partition 0 or 1 is read in last.
>
> Thanks again,
>
> Adriano
>
> ===================================
>
> Adriano Gagliardi MEng PhD
> Business Sector Leader
> Computational Aerodynamics
> Aircraft Research Association Ltd.
> Manton Lane
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> E-mail: agagliardi at ara.co.uk
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