<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
</head>
<body bgcolor="#FFFFFF" text="#000000">
I wanted to report a situation where D3 is generating really poor
domain decomposition. In this case it's taking decent data locality
and destroying it. This is a multiblock with 8 polydata surfaces.
Screen shot shows result with 4 mpi ranks, 8 produces a similar
result. D3 usually does a great job, so maybe this has hit some of
its weak spots. I'm surprised that there are so many disconnected
regions on each rank and that it doesn't retain any of the initial
data locality. Although here I was just experimenting trying to get
a more even data distribution by using d3, I think similar use cases
arise frequently. for example the need to re-balancing the data
distribution after an iso-surface in parallel. Should this be
considered a bug?<br>
<br>
<img src="cid:part1.08060803.06010605@lbl.gov" alt=""><br>
<br>
<br>
<br>
<br>
</body>
</html>