<div dir="ltr"><div>Thanks a lot, Matt.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Mar 12, 2022 at 9:50 PM Matthew Knepley <<a href="mailto:knepley@gmail.com">knepley@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr">On Sat, Mar 12, 2022 at 1:01 PM Bhargav Subramanya <<a href="mailto:bhargav.subramanya@kaust.edu.sa" target="_blank">bhargav.subramanya@kaust.edu.sa</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Dear All,<div><br></div><div>I have the following two queries:<br><br>1. I am running simulations using MUMPS through a job submission system. Since the job run time is limited, I need to restart the simulations periodically. Since I am restarting the simulation with exactly the same parameters, for instance, number of nodes, number of tasks per node, etc., is it possible to dump the matrix factors for the first time and reuse it for the remaining restarts?</div></div></blockquote><div><br></div><div>We do not have access to the MUMPS internals, so this is a MUMPS mailing list question I think.</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><div><div>2. In the Ax=b solve, for now, the Matrix A doesn't change. However, if I implement a slightly different time integration technique, matrix A changes with each time step (sparsity pattern is still the same). Is it possible to incorporate a modifying matrix A in the mumps solver?<br></div></div></div></div></blockquote><div><br></div><div>You can preserve the symbolic factorization, and just carry out the numerical factorization. I believe we do this automatically if you just update the values.</div><div><br></div><div> Thanks,</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><div><div>Thanks,<br>Bhargav <br></div></div></div></div>
<br>
<div><hr></div><font face="Arial" size="1">This message and its contents, including attachments are intended solely for the original recipient. If you are not the intended recipient or have received this message in error, please notify me immediately and delete this message from your computer system. Any unauthorized use or distribution is prohibited. Please consider the environment before printing this email.</font></blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener</div><div><br></div><div><a href="https://urldefense.com/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!Nmw4Hv0!hQIcrxqcQfYeuPg-qbN8w09rM3aWUYrg00a23Br1V4wSCGqDPI33F6JnK8YUTMHfnfal16GBMKU$" target="_blank">https://www.cse.buffalo.edu/~knepley/</a><br></div></div></div></div></div></div></div></div>
</blockquote></div>
<br>
<div><hr></div><font face="Arial" size="1">This message and its contents, including attachments are intended solely for the original recipient. If you are not the intended recipient or have received this message in error, please notify me immediately and delete this message from your computer system. Any unauthorized use or distribution is prohibited. Please consider the environment before printing this email.</font>