<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><br class=""></div> Philip,<div class=""><br class=""></div><div class=""> There a variety of techniques. Some of the command line options take an optional viewer name where the output can be redirected. For example </div><div class=""><br class=""></div><div class=""> -ts_monitor ascii:filename or -ts_view ascii:filename see <a href="https://petsc.org/release/docs/manualpages/Viewer/PetscOptionsGetViewer.html" class="">https://petsc.org/release/docs/manualpages/Viewer/PetscOptionsGetViewer.html</a> for more details</div><div class=""><br class=""></div><div class=""> It is also possible to change all stdout from PETSc to a different file by setting PETSC_STDOUT = fopen(...) </div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""> Barry</div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Sep 8, 2021, at 10:59 AM, Fackler, Philip via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov" class="">petsc-users@mcs.anl.gov</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;" class="">Is there a way to customize how petsc writes information? Instead of writing to stdout (for example:<span class="Apple-converted-space"> </span><span style="font-family: Consolas, Courier, monospace; background-color: rgb(153, 153, 153);" class="">0 TS dt 0.1 time 0.</span>), what if we want to log that message to a file other output from Xolotl? I'm assuming there are multiple ways of getting this result. What's common practice with petsc folks?<br class=""></div><div style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;" class=""><br class=""></div><div style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;" class="">Thanks,<br class=""></div><div style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><div id="Signature" class=""><div class=""><div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;" class=""><span style="font-size: 11pt;" class=""><strong class="">Philip Fackler<br class=""></strong></span></div><div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;" class=""><div class=""><span style="font-size: 11pt;" class="">Research Software Engineer, Application Engineering Group</span></div><div class=""><span style="font-size: 11pt;" class="">Advanced Computing Systems Research Section</span></div><div class=""><span style="font-size: 11pt;" class="">Computer Science and Mathematics Division<br class=""></span></div><div class=""><span style="font-size: 11pt;" class=""><strong class="">Oak Ridge National Laboratory</strong></span></div></div></div></div></div></div></blockquote></div><br class=""></div></body></html>