<div class="socmaildefaultfont" dir="ltr" style="font-family:Arial, Helvetica, sans-serif;font-size:12pt" ><div dir="ltr" >Does the output of mmdf show that data is evenly distributed across your NSDs? If not that could be contributing to your problem. Also, are your NSDs evenly distributed across your NSD servers, and the NSD configured so the first NSD server for each is not the same one?</div>
<div dir="ltr" ><div class="socmaildefaultfont" dir="ltr" style="font-family:Arial, Helvetica, sans-serif;font-size:10.5pt" ><div dir="ltr" ><br><font size="2" face="Default Sans Serif,Verdana,Arial,Helvetica,sans-serif" ><span style="font-size:1.143em;" >Fred<br>__________________________________________________<br>Fred Stock | IBM Pittsburgh Lab | 720-430-8821<br>stockf@us.ibm.com</span></font></div></div></div>
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<blockquote data-history-content-modified="1" dir="ltr" style="border-left:solid #aaaaaa 2px; margin-left:5px; padding-left:5px; direction:ltr; margin-right:0px" >----- Original message -----<br>From: "Saula, Oluwasijibomi" <oluwasijibomi.saula@ndsu.edu><br>Sent by: gpfsug-discuss-bounces@spectrumscale.org<br>To: "gpfsug-discuss@spectrumscale.org" <gpfsug-discuss@spectrumscale.org><br>Cc:<br>Subject: [EXTERNAL] [gpfsug-discuss] Client Latency and High NSD Server Load Average<br>Date: Wed, Jun 3, 2020 5:45 PM<br> <br><!--Notes ACF
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<div dir="ltr" id="divRplyFwdMsg" ><div><span style="color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;" >Hello,</span></div></div>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)" >Anyone faced a situation where a majority of NSDs have a high load average and a minority don't?</div>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)" >Also, is 10x NSD server latency for write operations than for read operations expected in any circumstance? </div>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)" >We are seeing client latency between 6 and 9 seconds and are wondering if some GPFS configuration or NSD server condition may be triggering this poor performance.</div>
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<div dir="ltr" id="x_divtagdefaultwrapper" style="font-size:12pt; color:#000000; font-family:Calibri,Arial,Helvetica,sans-serif" ><p style="margin-top: 0px; margin-bottom: 0px;margin-top:0px; margin-bottom:0px" > </p>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:16px; margin-top:0px; margin-bottom:0px" ><span style="font-family:Arial,sans-serif; font-size:13.3333px" >Thanks,</span></div>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:16px; margin-top:0px; margin-bottom:0px" ><p style="margin-top: 0px; margin-bottom: 0px;color:rgb(32,31,30); text-align:start; background-color:rgb(255,255,255); font-size:11pt; font-family:Calibri,sans-serif; margin:0px" ><font face="Calibri,Arial,Helvetica,sans-serif" ><b><span style="margin:0px; font-size:10pt; font-family:Arial,sans-serif; color:black" >Oluwasijibomi (Siji) Saula</span></b></font></p>
<p style="margin-top: 0px; margin-bottom: 0px;color:rgb(32,31,30); text-align:start; background-color:rgb(255,255,255); font-size:11pt; font-family:Calibri,sans-serif; margin:0px" ><font face="Calibri,Arial,Helvetica,sans-serif" ><span style="margin:0px; font-size:10pt; font-family:Arial,sans-serif; color:black" >HPC Systems Administrator / Information Technology</span></font></p>
<p style="margin-top: 0px; margin-bottom: 0px;color:rgb(32,31,30); text-align:start; background-color:rgb(255,255,255); font-size:11pt; font-family:Calibri,sans-serif; margin:0px" ><font face="Calibri,Arial,Helvetica,sans-serif" ><span style="margin:0px; font-size:10pt; font-family:Arial,sans-serif; color:black" > </span></font></p>
<p style="margin-top: 0px; margin-bottom: 0px;color:rgb(32,31,30); text-align:start; background-color:rgb(255,255,255); font-size:11pt; font-family:Calibri,sans-serif; margin:0px" ><font face="Calibri,Arial,Helvetica,sans-serif" ><span style="margin:0px; font-size:10pt; font-family:Arial,sans-serif; color:black" ><span style="font-family:Arial,sans-serif; background-color:rgb(255,255,255); display:inline!important" >Research 2 Building</span> 220B / Fargo ND 58108-6050</span></font></p>
<p style="margin-top: 0px; margin-bottom: 0px;color:rgb(32,31,30); text-align:start; background-color:rgb(255,255,255); font-size:11pt; font-family:Calibri,sans-serif; margin:0px" ><font face="Calibri,Arial,Helvetica,sans-serif" ><span style="margin:0px; font-size:10pt; font-family:Arial,sans-serif; color:black" >p: 701.231.7749 /<span> </span><a href="http://www.ndsu.edu/" rel="noopener noreferrer" style="margin:0px" target="_blank"><span style="margin:0px; color:purple" >www.ndsu.edu</span></a></span></font></p>
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<div><font size="2" face="Default Monospace,Courier New,Courier,monospace" >_______________________________________________<br>gpfsug-discuss mailing list<br>gpfsug-discuss at spectrumscale.org<br><a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss" target="_blank">http://gpfsug.org/mailman/listinfo/gpfsug-discuss</a> </font></div></blockquote>
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