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<p class="MsoNormal"><span style="font-size:12.0pt">You do realize 3.5 is out of service, correct? You should be looking at upgrading :-)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Catching this is real time, when you have a large number of nodes is going to be tough. How you recognizing that the file system is overloaded? Waiters? Looking at which nodes/NSDs have the longest/largest
waiters may provide a clue.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">You might also take a look at mmpmon – it’s a bit difficult to use in its raw state, but it does provide some good stats on a per file system basis. But you need to track these over times to get what you need.<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Bob Oesterlin<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Sr Principal Storage Engineer, Nuance<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black"><gpfsug-discuss-bounces@spectrumscale.org> on behalf of Richard Lefebvre <richard.lefebvre+gpfsug@calculquebec.ca><br>
<b>Reply-To: </b>gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><br>
<b>Date: </b>Monday, September 18, 2017 at 2:18 PM<br>
<b>To: </b>gpfsug <gpfsug-discuss@spectrumscale.org><br>
<b>Subject: </b>[EXTERNAL] [gpfsug-discuss] How to find which node is generating high iops in a GPFS 3.5<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi I have a 3.5 GPFS system with 700+ nodes. I sometime have nodes that generate a lot of iops on the large file system but I cannot find the right tool to find which node is the source. I'm guessing under 4.2.X, there are now easy tools,
but what can be done under GPFS 3.5.<o:p></o:p></p>
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