<html><body><p><font size="2">Hi</font><br><br><font size="2">Please check the IO type before examining the IP address for the output of mmdiag --iohist. For the "lcl"(local) IO, the IP address is not necessary and we don't show it. Please check whether this is your case.</font><br><br><font size="2" color="#000080" face="Menlo-Regular">=== mmdiag: iohist ===</font><br><br><font size="2" color="#000080" face="Menlo-Regular">I/O history:</font><br><br><font size="2" color="#000080" face="Menlo-Regular"> I/O start time RW Buf type disk:sectorNum nSec time ms Type Device/NSD ID NSD node</font><br><font size="2" color="#000080" face="Menlo-Regular">--------------- -- ----------- ----------------- ----- ------- ---- ------------------ ---------------</font><br><font size="2" color="#000080" face="Menlo-Regular">01:14:08.450177 R inode 6:189513568 8 4.920 srv dm-4 192.168.116.92</font><br><font size="2" color="#000080" face="Menlo-Regular">01:14:08.450448 R inode 6:189513664 8 4.968 srv dm-4 192.168.116.92</font><br><font size="2" color="#000080" face="Menlo-Regular">01:14:08.475689 R inode 6:189428264 8 0.230 srv dm-4 192.168.116.92</font><br><font size="2" color="#000080" face="Menlo-Regular">01:14:08.983587 W logData 4:30686784 8 0.216 lcl dm-0 </font><br><font size="2" color="#000080" face="Menlo-Regular">01:14:08.983601 W logData 3:25468480 8 0.197 lcl dm-8 </font><br><font size="2" color="#000080" face="Menlo-Regular">01:14:08.983961 W inode 2:188808504 8 0.142 lcl dm-11 </font><br><font size="2" color="#000080" face="Menlo-Regular">01:14:08.984144 W inode 1:188808504 8 0.134 lcl dm-7 </font><font size="4" color="#00C200" face="Menlo-Regular"> </font><br><br><br><br><font size="2">Regards, The Spectrum Scale (GPFS) team<br><br>------------------------------------------------------------------------------------------------------------------<br>If you feel that your question can benefit other users of Spectrum Scale (GPFS), then please post it to the public IBM developerWroks Forum at <a href="https://www.ibm.com/developerworks/community/forums/html/forum?id=11111111-0000-0000-0000-000000000479">https://www.ibm.com/developerworks/community/forums/html/forum?id=11111111-0000-0000-0000-000000000479</a>. <br><br>If your query concerns a potential software error in Spectrum Scale (GPFS) and you have an IBM software maintenance contract please contact 1-800-237-5511 in the United States or your local IBM Service Center in other countries. <br><br>The forum is informally monitored as time permits and should not be used for priority messages to the Spectrum Scale (GPFS) team.</font><br><br><img width="16" height="16" src="cid:1__=C7BB0840DFB6362A8f9e8a93df938690918cC7B@" border="0" alt="Inactive hide details for "Buterbaugh, Kevin L" ---07/11/2018 10:34:32 PM---Hi All, Quick question about \u201cmmdiag \u2014iohist\u201d th"><font size="2" color="#424282">"Buterbaugh, Kevin L" ---07/11/2018 10:34:32 PM---Hi All, Quick question about \u201cmmdiag \u2014iohist\u201d that is not documented in the man page \u2026 what does it</font><br><br><font size="2" color="#5F5F5F">From: </font><font size="2">"Buterbaugh, Kevin L" <Kevin.Buterbaugh@Vanderbilt.Edu></font><br><font size="2" color="#5F5F5F">To: </font><font size="2">gpfsug main discussion list <gpfsug-discuss@spectrumscale.org></font><br><font size="2" color="#5F5F5F">Date: </font><font size="2">07/11/2018 10:34 PM</font><br><font size="2" color="#5F5F5F">Subject: </font><font size="2">[gpfsug-discuss] mmdiag --iohist question</font><br><font size="2" color="#5F5F5F">Sent by: </font><font size="2">gpfsug-discuss-bounces@spectrumscale.org</font><br><hr width="100%" size="2" align="left" noshade style="color:#8091A5; "><br><br><br>Hi All, <br><br>Quick question about \u201cmmdiag \u2014iohist\u201d that is not documented in the man page \u2026 what does it mean if the client IP address field is blank? That the NSD server itself issued the I/O? Or ???<br><br>This only happens occasionally \u2026 and the way I discovered it was that our Python script that takes \u201cmmdiag \u2014iohist\u201d output, looks up the client IP for any waits above the threshold, converts that to a hostname, and queries SLURM for whose jobs are on that client started occasionally throwing an exception \u2026 and when I started looking at the \u201cmmdiag \u2014iohist\u201d output itself I do see times when there is no client IP address listed for a I/O wait.<br><br>Thanks\u2026<br><br>Kevin<br><br>\u2014<br>Kevin Buterbaugh - Senior System Administrator<br>Vanderbilt University - Advanced Computing Center for Research and Education<br><a href="mailto:Kevin.Buterbaugh@vanderbilt.edu"><u><font color="#0000FF">Kevin.Buterbaugh@vanderbilt.edu</font></u></a> - (615)875-9633<br><br><br><tt><font size="2">_______________________________________________<br>gpfsug-discuss mailing list<br>gpfsug-discuss at spectrumscale.org<br></font></tt><tt><font size="2"><a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss">http://gpfsug.org/mailman/listinfo/gpfsug-discuss</a></font></tt><tt><font size="2"><br></font></tt><br><br><BR>
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