Adriano,<div><br></div><div>I'm not totally sure I understand your question but this thread might be of use where I was asking about multi block data sets in parallel:</div><div><br></div><div> <a href="http://markmail.org/message/skb653xqwa4hvs4c">http://markmail.org/message/skb653xqwa4hvs4c</a></div>
<div><br></div><div>Regards,</div><div>Paul</div><div><br><br><div class="gmail_quote">On 28 June 2011 16:24, Andy Bauer <span dir="ltr"><<a href="mailto:andy.bauer@kitware.com">andy.bauer@kitware.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">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 <a href="http://www.vtk.org/doc/nightly/html/classvtkMultiBlockDataSet.html#details" target="_blank">http://www.vtk.org/doc/nightly/html/classvtkMultiBlockDataSet.html#details</a><br>
<br>HTH,<br><font color="#888888">Andy</font><div><div></div><div class="h5"><br><br><div class="gmail_quote">On Tue, Jun 28, 2011 at 5:38 AM, Adriano Gagliardi <span dir="ltr"><<a href="mailto:agagliardi@ara.co.uk" target="_blank">agagliardi@ara.co.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex"><br>
I've run into an issue when writing a parallel reader for partitioned files<br>
containing multi-block data. All data reads in fine on each process and<br>
works as expected, except for one thing. Since each partition only knows<br>
about the blocks it contains (and not the global blocks), I've not been able<br>
to have all the blocks available in the entire data-set available to the<br>
user. What I get instead is the list of blocks read in by the last data<br>
reader. I've got a couple of ideas to resolve this issue.<br>
<br>
(1) Have some sort of communication between each of the PV processes to<br>
ascertain which process has which data<br>
<br>
(2) Have the number of blocks stored on each process the same as the global<br>
number of blocks, but just allocate data to the blocks that each<br>
partition/process has data of.<br>
<br>
So, my questions are:<br>
<br>
(1) Is item (1) possible and, if so, what class(es) should I be looking at<br>
to do it<br>
<br>
(2) Will item (2) alone solve my issue, or will I run into problems whereby<br>
if block 0 has 50% of its data on partition 0 and the rest on partition 1<br>
that, after reading in, I will only ever see 50% of block 0 being whichever<br>
of partition 0 or 1 is read in last.<br>
<br>
Thanks again,<br>
<br>
Adriano<br>
<br>
===================================<br>
<br>
Adriano Gagliardi MEng PhD<br>
Business Sector Leader<br>
Computational Aerodynamics<br>
Aircraft Research Association Ltd.<br>
Manton Lane<br>
Bedford<br>
<br>
Tel: 01234 32 4644<br>
E-mail: <a href="mailto:agagliardi@ara.co.uk" target="_blank">agagliardi@ara.co.uk</a><br>
Url: <a href="http://www.ara.co.uk" target="_blank">www.ara.co.uk</a><br>
<br>
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