<html dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style id="owaParaStyle" type="text/css">P {margin-top:0;margin-bottom:0;}</style>
</head>
<body ocsi="0" fpstyle="1">
<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;"><br>
I personally prefer to dump distributed data with MPI-IO into a single file of raw data, and then I use the Xdmf wrapper to read the raw data. I find it much simpler to specify extents, etc.<br>
<br>
The other advantage of using Xdmf is that I can read it with at least two different open-source viz applications. My Xdmf lightweight data is the following, for a single attribute, written in parallel by an app running on 32 MPI tasks partitioned in an 8x4
cartesian MPI grid, each task writing its 64^3 block<br>
Please note the <b>Format="Binary"</b><br>
<br>
<?xml version="1.0" ?><br>
<!DOCTYPE Xdmf SYSTEM "Xdmf.dtd" []><br>
<Xdmf xmlns:xi="http://www.w3.org/2003/XInclude" Version="2.2"><br>
<Domain><br>
<Grid Name="Jacobi Mesh" GridType="Uniform"><br>
<Topology TopologyType="3DCORECTMESH" Dimensions="64 256 512"/><br>
<Geometry GeometryType="ORIGIN_DXDYDZ"><br>
<DataItem Name="Origin" NumberType="Float" Dimensions="3" Format="XML">0. 0. 0.</DataItem><br>
<DataItem Name="Spacing" NumberType="Float" Dimensions="3" Format="XML">1. 1. 1.</DataItem><br>
</Geometry><br>
<Attribute Name="Temperature" Active="1" AttributeType="Scalar" Center="Node"><br>
<DataItem Dimensions="64 256 512" NumberType="Float" Precision="4" Format="Binary">bench_raw.0000</DataItem><br>
</Attribute><br>
</Grid><br>
</Domain><br>
</Xdmf><br>
<br>
Give Xdmf a try. ParaView will read it in parallel without any problem (Xdmf2)<br>
<div><br>
<div class="BodyFragment"><font size="2"><span style="font-size:10pt;">
<div class="PlainText">-----------------<br>
Jean M. Favre<br>
Swiss National Supercomputing Center<br>
CH-6900 Lugano<br>
Switzerland</div>
</span></font></div>
</div>
</div>
</body>
</html>