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Hi Hassan,</div>
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Would you try setting the following environment variable prior to running your application?<br>
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export DARSHAN_LOGHINTS="romio_no_indep_rw=true;cb_nodes=1"<br>
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Maybe that will work out better when writing Darshan logs to an NFS mount.<br>
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Thanks,</div>
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--Shane<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Darshan-users <darshan-users-bounces@lists.mcs.anl.gov> on behalf of Hassan Asghar <haxxanasghar@gmail.com><br>
<b>Sent:</b> Thursday, July 15, 2021 4:14 AM<br>
<b>To:</b> darshan-users@lists.mcs.anl.gov <darshan-users@lists.mcs.anl.gov><br>
<b>Subject:</b> [Darshan-users] Unable to create log:</font>
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I have three gpus. darshan and darshan-logs are installed and shared via nfs. all permissions are set. I don't know why logs are not created:</div>
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[haxxanasghar@gpuserver2 ~]$ mpiexec -n 64 -f machinefile -env LD_PRELOAD=/home/haxxanasghar/darshan/darshan-runtime/lib/libdarshan.so ./MADbench2 640 80 4 1 8 4 4<br>
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MADbench 2.0 IO-mode<br>
no_pe = 64 no_pix = 640 no_bin = 80 no_gang = 4 sblocksize = 1 fblocksize = 8 r_mod = 4 w_mod = 4<br>
IOMETHOD = POSIX IOMODE = SYNC FILETYPE = UNIQUE REMAP = CUSTOM<br>
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S_cc 0.03 [ 0.03: 0.03]<br>
S_bw 0.02 [ 0.02: 0.02]<br>
S_w 0.03 [ 0.03: 0.03]<br>
-------<br>
S_total 0.08 [ 0.08: 0.08]<br>
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W_cc 0.12 [ 0.07: 0.14]<br>
W_bw 0.77 [ 0.72: 0.85]<br>
W_r 0.02 [ 0.02: 0.02]<br>
W_w 0.01 [ 0.01: 0.01]<br>
-------<br>
W_total 0.92 [ 0.89: 0.95]<br>
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C_cc 0.01 [ 0.01: 0.01]<br>
C_bw 0.00 [ 0.00: 0.00]<br>
C_r 0.01 [ 0.00: 0.01]<br>
-------<br>
C_total 0.02 [ 0.02: 0.02]<br>
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dC[0] = 0.00000e+00<br>
darshan_library_warning: unable to create log file /home/haxxanasghar/darshan-logs/2021/7/15/haxxanas_MADbench2_id17444-17444_7-15-65476-1341319014666854881.darshan_partial.<br>
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<div style="font-size:12.8px; font-family:arial,sans-serif">--</div>
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<div><span style="font-family:tahoma; font-size:13.3333px; color:rgb(0,0,0)">Regards,</span>
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<div style="font-family:tahoma; font-size:13.3333px; color:rgb(0,0,0)"><span style="color:rgb(51,0,102)"><b>Hassan Asghar</b></span></div>
<div style="font-family:tahoma; font-size:13.3333px; color:rgb(0,0,0)"><span style="color:rgb(51,51,102); font-size:13.3333px">Ph.D Scholar</span></div>
<div style="font-family:tahoma; font-size:13.3333px; color:rgb(0,0,0)"><span style="color:rgb(51,51,102)">Mobile: +82-010-9686-1912</span></div>
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<div><span style="color:rgb(51,51,102); font-family:tahoma; font-size:13.3333px">Personal Website: </span><font color="#333366" face="tahoma"><span style="font-size:13.3333px"><a href="http://bit.ly/2OQ0egs" target="_blank">http://bit.ly/2OQ0egs</a></span></font></div>
<div style="font-family:tahoma; font-size:13.3333px; color:rgb(0,0,0)"><span style="color:rgb(51,51,102); font-size:13.3333px">Google Scholar</span>: <a href="https://bit.ly/3lVYuxF" target="_blank">https://bit.ly/3lVYuxF</a></div>
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