<div dir="ltr">The difficulty in parallel with unstructured grids is that it's tough to determine which cells need which points so for unstructured grids that are stored in a single file, all points often time are either read in on process 0 and broadcast out or each process reads in all points. Neither of these methods scale well. The advantage of multiple files here is that in each file the points are just the ones that are needed by the cells in that file. You could do a similar thing with blocks of points and cells in a single file. The main point here is that you need to think about an algorithm that has each process read in only (or nearly only) the points it needs in order to read in the cells in gets assigned. Also, consider whether or not you want your reader to be able to read in ghost cells as well. It's not a requirement for parallel readers but certain filter work better with ghost cells.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Aug 23, 2016 at 9:51 AM, sumeet kumar <span dir="ltr"><<a href="mailto:sumeet.kumar507@gmail.com" target="_blank">sumeet.kumar507@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I have unstructured grids<br></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Aug 23, 2016 at 6:50 AM, Andy Bauer <span dir="ltr"><<a href="mailto:andy.bauer@kitware.com" target="_blank">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"><div dir="ltr">What kind of grid is it? It's much easier to read in topologically regular grids in parallel than unstructured grids.<br></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div>On Tue, Aug 23, 2016 at 9:47 AM, sumeet kumar <span dir="ltr"><<a href="mailto:sumeet.kumar507@gmail.com" target="_blank">sumeet.kumar507@gmail.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><div dir="ltr"><div><div>Hello all, <br><br></div>Let's have a very large mesh in GB's/TB's that too in one file. How can I read that file in parallel with any arbitrary number of processors.<br><br></div><div>How can I divide my mesh in N independent pieces? that each processor would read. Is there any instructions for doing such kind of think in para-view.<br><br></div><div>Is reading multiple files in parallel more efficient or reading one file in parallel more efficient in para-view. In either of these how I should design my output to be most efficient to be read by ParaView in Parallel.<span><font color="#888888"><br><br><br></font></span></div><span><font color="#888888"><div>Sumeet<br clear="all"></div><div><div><div><br>-- <br><div data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div><span><img src="http://faculty.engineering.ucdavis.edu/ceetemplate/wp-content/uploads/2013/06/CEE75percent500w.jpg" style="font-size:12.8000001907349px" height="31" width="200"><span style="font-size:12.8000001907349px"> </span><br><div><font style="font-family:'trebuchet ms',sans-serif;font-size:12.8000001907349px;color:rgb(51,51,51)">Sumeet Kumar Sinha</font></div><div><span style="color:rgb(51,51,51);font-family:'trebuchet ms',sans-serif;font-size:small">Graduate Student</span></div><div><span style="font-size:12.8000001907349px;font-family:'trebuchet ms',sans-serif;color:rgb(51,51,51)">Phone: (+1)</span><a href="tel:%28%2B91%29%209910516219" value="+919910516219" style="font-size:12.8000001907349px;font-family:'trebuchet ms',sans-serif;color:rgb(17,85,204)" target="_blank"> </a><span style="font-size:12.8000001907349px;font-family:'trebuchet ms',sans-serif;color:rgb(51,51,51)"><a href="tel:5306018271" value="+15306018271" target="_blank">5306018271</a></span></div><div><span style="color:rgb(51,51,51);font-family:'trebuchet ms',sans-serif;font-size:12.8000001907349px">Website : </span><a href="http://www.sumeetksinha.com/" style="font-family:'trebuchet ms',sans-serif;font-size:12.8000001907349px;color:rgb(17,85,204)" target="_blank">http://www.sumeetksinha.com/</a></div></span></div></div></div></div></div></div></div></div>
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</blockquote></div><br><br clear="all"><br>-- <br><div data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div><span><img src="http://faculty.engineering.ucdavis.edu/ceetemplate/wp-content/uploads/2013/06/CEE75percent500w.jpg" style="font-size:12.8000001907349px" height="31" width="200"><span style="font-size:12.8000001907349px"> </span><br><div><font style="font-family:'trebuchet ms',sans-serif;font-size:12.8000001907349px;color:rgb(51,51,51)">Sumeet Kumar Sinha</font></div><div><span style="color:rgb(51,51,51);font-family:'trebuchet ms',sans-serif;font-size:small">Graduate Student</span></div><div><span style="font-size:12.8000001907349px;font-family:'trebuchet ms',sans-serif;color:rgb(51,51,51)">Phone: (+1)</span><a href="tel:%28%2B91%29%209910516219" value="+919910516219" style="font-size:12.8000001907349px;font-family:'trebuchet ms',sans-serif;color:rgb(17,85,204)" target="_blank"> </a><span style="font-size:12.8000001907349px;font-family:'trebuchet ms',sans-serif;color:rgb(51,51,51)"><a href="tel:5306018271" value="+15306018271" target="_blank">5306018271</a></span></div><div><span style="color:rgb(51,51,51);font-family:'trebuchet ms',sans-serif;font-size:12.8000001907349px">Website : </span><a href="http://www.sumeetksinha.com/" style="font-family:'trebuchet ms',sans-serif;font-size:12.8000001907349px;color:rgb(17,85,204)" target="_blank">http://www.sumeetksinha.com/</a></div></span></div></div></div></div></div></div></div></div>
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