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Hi GPFS team,
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<div class="">Yes, that’s what we see, too … thanks.</div>
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<div class="">Kevin</div>
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<div class="">—</div>
<div class="">Kevin Buterbaugh - Senior System Administrator</div>
<div class="">Vanderbilt University - Advanced Computing Center for Research and Education</div>
<div class=""><a href="mailto:Kevin.Buterbaugh@vanderbilt.edu" class="">Kevin.Buterbaugh@vanderbilt.edu</a> - (615)875-9633</div>
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<div class="">On Jul 23, 2018, at 1:51 AM, IBM Spectrum Scale <<a href="mailto:scale@us.ibm.com" class="">scale@us.ibm.com</a>> wrote:</div>
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<p class=""><font size="2" class="">Hi</font><br class="">
<br class="">
<font size="2" class="">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 class="">
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<font size="2" color="#000080" face="Menlo-Regular" class="">=== mmdiag: iohist ===</font><br class="">
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<font size="2" color="#000080" face="Menlo-Regular" class="">I/O history:</font><br class="">
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<font size="2" color="#000080" face="Menlo-Regular" class="">I/O start time RW Buf type disk:sectorNum nSec time ms Type Device/NSD ID NSD node</font><br class="">
<font size="2" color="#000080" face="Menlo-Regular" class="">--------------- -- ----------- ----------------- ----- ------- ---- ------------------ ---------------</font><br class="">
<font size="2" color="#000080" face="Menlo-Regular" class="">01:14:08.450177 R inode 6:189513568 8 4.920 srv dm-4 192.168.116.92</font><br class="">
<font size="2" color="#000080" face="Menlo-Regular" class="">01:14:08.450448 R inode 6:189513664 8 4.968 srv dm-4 192.168.116.92</font><br class="">
<font size="2" color="#000080" face="Menlo-Regular" class="">01:14:08.475689 R inode 6:189428264 8 0.230 srv dm-4 192.168.116.92</font><br class="">
<font size="2" color="#000080" face="Menlo-Regular" class="">01:14:08.983587 W logData 4:30686784 8 0.216 lcl dm-0
</font><br class="">
<font size="2" color="#000080" face="Menlo-Regular" class="">01:14:08.983601 W logData 3:25468480 8 0.197 lcl dm-8
</font><br class="">
<font size="2" color="#000080" face="Menlo-Regular" class="">01:14:08.983961 W inode 2:188808504 8 0.142 lcl dm-11
</font><br class="">
<font size="2" color="#000080" face="Menlo-Regular" class="">01:14:08.984144 W inode 1:188808504 8 0.134 lcl dm-7
</font><font size="4" color="#00C200" face="Menlo-Regular" class=""></font><br class="">
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<font size="2" class="">Regards, The Spectrum Scale (GPFS) team<br class="">
<br class="">
------------------------------------------------------------------------------------------------------------------<br class="">
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<span id="cid:1__=C7BB0840DFB6362A8f9e8a93df938690918cC7B@"><graycol.gif></span><font size="2" color="#424282" class="">"Buterbaugh, Kevin L" ---07/11/2018 10:34:32 PM---Hi All, Quick question about “mmdiag —iohist” that is not documented in the man page …
what does it</font><br class="">
<br class="">
<font size="2" color="#5F5F5F" class="">From: </font><font size="2" class="">"Buterbaugh, Kevin L" <<a href="mailto:Kevin.Buterbaugh@Vanderbilt.Edu" class="">Kevin.Buterbaugh@Vanderbilt.Edu</a>></font><br class="">
<font size="2" color="#5F5F5F" class="">To: </font><font size="2" class="">gpfsug main discussion list <<a href="mailto:gpfsug-discuss@spectrumscale.org" class="">gpfsug-discuss@spectrumscale.org</a>></font><br class="">
<font size="2" color="#5F5F5F" class="">Date: </font><font size="2" class="">07/11/2018 10:34 PM</font><br class="">
<font size="2" color="#5F5F5F" class="">Subject: </font><font size="2" class="">[gpfsug-discuss] mmdiag --iohist question</font><br class="">
<font size="2" color="#5F5F5F" class="">Sent by: </font><font size="2" class=""><a href="mailto:gpfsug-discuss-bounces@spectrumscale.org" class="">gpfsug-discuss-bounces@spectrumscale.org</a></font><br class="">
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Hi All, <br class="">
<br class="">
Quick question about “mmdiag —iohist” that is not documented in the man page … what does it mean if the client IP address field is blank? That the NSD server itself issued the I/O? Or ???<br class="">
<br class="">
This only happens occasionally … and the way I discovered it was that our Python script that takes “mmdiag —iohist” 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 … and when I started looking at the “mmdiag —iohist” output itself I do see times when there is no client IP address listed for a I/O wait.<br class="">
<br class="">
Thanks…<br class="">
<br class="">
Kevin<br class="">
<br class="">
—<br class="">
Kevin Buterbaugh - Senior System Administrator<br class="">
Vanderbilt University - Advanced Computing Center for Research and Education<br class="">
<a href="mailto:Kevin.Buterbaugh@vanderbilt.edu" class=""><u class=""><font color="#0000FF" class="">Kevin.Buterbaugh@vanderbilt.edu</font></u></a> - (615)875-9633<br class="">
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