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<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); "><div><div><div style="font-family: Calibri, sans-serif; font-size: 14px; ">Hi All,</div><div style="font-family: Calibri, sans-serif; font-size: 14px; ">I am encountering a problem with writing history file with parallel netCDF or dedicated cores. The history file writing time in WRF can be reduced using either parallel netCDF (io_form_history=11) and/or by specifically allocating few cores to nio_tasks_per_group. Both of these methods works fine for me on our BlueGene/P as long as the domain size is small say 400*400 points. However, when I increase the domain size and try to use any of these options, the history(output data) is not properly written to wrfout file. When I try to dig the output file with ncdump or ncview, I don't get any output variable, neither any time stamp or coordinate variable is found, although the file size is huge (80GB). I think the data is written to the history file but for some reason it is not properly organized and therefore becomes in-accessible. I wonder if someone has encountered this sort of problem and knows the fix.</div><div style="font-family: Calibri, sans-serif; font-size: 14px; "><br></div><div style="font-family: Calibri, sans-serif; font-size: 14px; ">Thanks </div><div style="font-family: Calibri, sans-serif; font-size: 14px; ">----</div><div><div><div><p class="MsoNormal" style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 10.5pt; color: black; font-family: Calibri, sans-serif; ">Basit A. Khan, Ph.D.<o:p></o:p></span></p></div><div style="font-family: Calibri, sans-serif; font-size: medium; "><p class="MsoNormal" style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 10.5pt; color: black; font-family: Calibri, sans-serif; ">Postdoctoral Research Fellow<o:p></o:p></span></p></div><div style="font-family: Calibri, sans-serif; font-size: medium; "><p class="MsoNormal" style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 10.5pt; color: black; font-family: Calibri, sans-serif; ">Division of Physical Sciences & Engineering<o:p></o:p></span></p></div><div style="font-family: Calibri, sans-serif; font-size: medium; "><p class="MsoNormal" style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 10.5pt; color: black; font-family: Calibri, sans-serif; ">Office# 3204, Level 3, Building 1,<o:p></o:p></span></p></div><div style="font-family: Calibri, sans-serif; font-size: medium; "><p class="MsoNormal" style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 10.5pt; color: black; font-family: Calibri, sans-serif; ">King Abdullah University of Science & Technology<o:p></o:p></span></p></div><div style="font-family: Calibri, sans-serif; font-size: medium; "><p class="MsoNormal" style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 10.5pt; color: black; font-family: Calibri, sans-serif; ">4700 King Abdullah Blvd, Box 2753, Thuwal 23955 –6900,<o:p></o:p></span></p></div><div style="font-family: Calibri, sans-serif; font-size: medium; "><p class="MsoNormal" style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 10.5pt; color: black; font-family: Calibri, sans-serif; ">Kingdom of Saudi Arabia.<o:p></o:p></span></p></div><div style="font-family: Calibri, sans-serif; font-size: medium; "><p class="MsoNormal" style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 10.5pt; color: black; font-family: Calibri, sans-serif; "><o:p> </o:p></span></p></div><div style="font-family: Calibri, sans-serif; font-size: medium; "><p class="MsoNormal" style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 10.5pt; color: black; font-family: Calibri, sans-serif; ">Office: +966(0)2 808 0276, Mobile: +966(0)5 0860 3617<o:p></o:p></span></p></div><div style="font-family: Calibri, sans-serif; font-size: medium; "><p class="MsoNormal" style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 10.5pt; color: black; font-family: Calibri, sans-serif; ">E-mail: <a href="mailto:basitali.khan@kaust.edu.sa" style="color: blue; text-decoration: underline; ">basitali.khan@kaust.edu.sa</a><o:p></o:p></span></p></div><div style="font-family: Calibri, sans-serif; font-size: medium; "><p class="MsoNormal" style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 10.5pt; color: black; font-family: Calibri, sans-serif; ">Skype name: basit.a.khan </span></p></div></div></div></div></div></body></html>