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<div class="moz-cite-prefix">Hi John,<br>
<br>
In hind sight I think d3 is doing something reasonable. you have
quite a few use cases to support. when blocks are only a vehicle
for parallelism, the block structure doesn't matter and could be
ignored or done away with. when blocks describe physical
structures, assemblies, parts of a machines and so on, you will
have to retain the full heirarchy. perhaps a data partitioner
could make a better decomposition if there was a way to let the
user choose which level of structure he wants to retain and do the
best it can within that constraint...<br>
<br>
In my case ParaView had saved unexpected sub-block partitions, 1
dataset per rank within each block, in the vtm file based on how
many ranks were running at the time i extracted the surface (8
ranks x 8 blocks = 64 sub block partitions in the vtm file). But
when that file is loaded in PV it shows no evidence of this, both
composite index and process id correspond to the original 8
blocks. However d3 partitioned each of those sub-block partitions.
in my case 4 ranks 64 sub blocks = 256 partitions in all!
definitely not what I expected and I guess its a worst case
scenario for d3. I don't care about sub block partitioning
structure that PV used when I saved the data. But there's no way
the writer, reader, or d3 could know that.<br>
<br>
Burlen<br>
<br>
On 05/10/2013 02:06 PM, Biddiscombe, John A. wrote:<br>
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Burlen,
Ken, List<o:p></o:p></span></p>
<div>
<div>
<div>
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">><o:p> </o:p></span></b></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">The
D3 filter will partition each block independently.
This means that each process will have a small region
in each partition, which will be spread throughout the
dataset.</span><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"><<o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">This
is my own experience too.
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Question:
What would you like to see in the output<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span
style="mso-list:Ignore">1)<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Existing
behaviour, each block is partitioned separately,
previous multiblock structure is preserved<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span
style="mso-list:Ignore">2)<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">All
blocks partitioned as a single block, no multiblock
structure in the output<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span
style="mso-list:Ignore">3)<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">All
blocks partitioned as a single block, multiblock
structure from input regenerated based on a block Id
assigned to each cell prior to partitioning.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The
reason I ask is because I’m working on a new
partitioning class and I have not yet handled
multi-block datasets and I wonder what ought to be
done in this case. 3) seems ideal, but is a bit harder
and might use some intermediate memory that would be
undesireable.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">JB<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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