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<p class="MsoNormal">Hi!<o:p></o:p></p>
<p class="MsoNormal">What would you suggest when using <o:p></o:p></p>
<p class="MsoNormal">If we have a large flash storage: Does it make sense to split metdata from data?
<o:p></o:p></p>
<p class="MsoNormal">Are there any disadvantages when putty meta and data into the same disk pool (fastes technology)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best regards<o:p></o:p></p>
<p class="MsoNormal">Walter <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span lang="DE-AT" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:DE-AT">Mit freundlichen Grüßen<br>
<b><i>Walter Sklenka</i></b><br>
</span><b><i><span lang="DE-AT" style="font-size:8.0pt;font-family:"Arial",sans-serif;color:gray;mso-fareast-language:DE-AT">Technical Consultant</span></i></b><span lang="DE-AT" style="color:black;mso-fareast-language:DE-AT">
</span><span lang="DE-AT" style="color:#212121;mso-fareast-language:DE-AT"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE-AT" style="font-size:12.0pt;font-family:"Times New Roman",serif;color:black;mso-fareast-language:DE-AT"> </span><span lang="DE-AT" style="color:#212121;mso-fareast-language:DE-AT"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="DE-AT" style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:DE-AT">EDV-Design Informationstechnologie GmbH<br>
Giefinggasse 6/1/2, A-1210 Wien<br>
Tel: +43 1 29 22 165-31<br>
Fax: +43 1 29 22 165-90<br>
E-Mail: <a href="mailto:sklenka@edv-design.at" target="_blank"><span style="color:#0563C1">sklenka@edv-design.at</span></a></span><span lang="DE-AT" style="font-size:8.0pt;color:black;mso-fareast-language:DE-AT"><br>
</span><span lang="DE-AT" style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:DE-AT">Internet:
<a href="http://www.edv-design.at/" target="_blank"><span style="color:#0563C1">www.edv-design.at</span></a><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="DE"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="DE">Von:</span></b><span lang="DE"> gpfsug-discuss <gpfsug-discuss-bounces@gpfsug.org>
<b>Im Auftrag von </b>Walter Sklenka<br>
<b>Gesendet:</b> Sunday, March 5, 2023 4:12 PM<br>
<b>An:</b> gpfsug main discussion list <gpfsug-discuss@gpfsug.org><br>
<b>Betreff:</b> Re: [gpfsug-discuss] Reasons for DiskLeaseThread Overloaded // detectIpPairAggressiveness<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="DE-AT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="DE-AT">Hi Felipe!<o:p></o:p></span></p>
<p class="MsoNormal">Yes . I am very sorry that I answer with such a delay!!<o:p></o:p></p>
<p class="MsoNormal">This was the response from the Support <o:p></o:p></p>
<p class="MsoNormal">“<o:p></o:p></p>
<p class="MsoNormal"><span class="fontstyle01"><span style="font-size:9.0pt">The IP pair connectivity detection is to address this issue:</span></span><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black"><br>
<span class="fontstyle01">If there are more than one IP pair between a pair of nodes, if one of the IP pair has some problems, and disk lease request or reply</span><br>
<span class="fontstyle01">happens be sent on this IP pair, disk lease overdue could happen since TCP has very long retransmit timeout, but since the other IP</span><br>
<span class="fontstyle01">pairs are in good condition, we should avoid the node expel and send disk lease via other good IP pairs. So, when sending disk</span><br>
<span class="fontstyle01">lease and reply, we will detect the connectivity of the IP pair, if it’s in good condition, disk lease and reply will be sent, otherwise, we</span><br>
<span class="fontstyle01">will try other IP pairs for sending.</span><br>
<span class="fontstyle01">detectIpPairAggressiveness (undocumented configuration parameter) control whether we do detection,
</span></span><span class="fontstyle21"><span style="font-size:9.0pt">here there is only ONE IP</span></span><b><span style="font-size:9.0pt;font-family:Helvetica-Bold;color:black"><br>
<span class="fontstyle21">pair, actually, we don't need to check the IP pair connectivity.
</span></span></b><span class="fontstyle01"><span style="font-size:9.0pt">But we still need ping to work since we have other places to do</span></span><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black"><br>
<span class="fontstyle01">ping check, like when disk lease overdue happens.</span><br>
<span class="fontstyle01">---------------------------</span></span><span class="fontstyle01"><span lang="DE-AT" style="font-size:9.0pt"><o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="fontstyle01"><span style="font-size:9.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="fontstyle01"><span style="font-size:9.0pt">until the 5.1.7 code will be available early march detectIpPairAggressiveness may can be disabled.</span></span><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black"><br>
<span class="fontstyle01">echo 999 | mmchconfig detectIpPairAggressiveness=0 -i<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="fontstyle01"><span style="font-size:9.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="fontstyle01"><span style="font-size:9.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="fontstyle01"><b><span style="font-size:9.0pt;color:red;background:yellow;mso-highlight:yellow">THANK YOU VERY MUCH, Felipe!!!</span></b></span><span class="fontstyle01"><b><span style="font-size:9.0pt;color:red"><o:p></o:p></span></b></span></p>
<p class="MsoNormal"><span lang="DE-AT"><o:p> </o:p></span></p>
<p class="MsoNormal">Best regards<o:p></o:p></p>
<p class="MsoNormal">Walter <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> gpfsug-discuss <<a href="mailto:gpfsug-discuss-bounces@gpfsug.org">gpfsug-discuss-bounces@gpfsug.org</a>>
<b>On Behalf Of </b>Felipe Knop<br>
<b>Sent:</b> Donnerstag, 2. März 2023 04:33<br>
<b>To:</b> gpfsug main discussion list <<a href="mailto:gpfsug-discuss@gpfsug.org">gpfsug-discuss@gpfsug.org</a>><br>
<b>Subject:</b> Re: [gpfsug-discuss] Reasons for DiskLeaseThread Overloaded<o:p></o:p></p>
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<p class="MsoNormal"><span lang="DE-AT"><o:p> </o:p></span></p>
<p class="MsoNormal">Walter,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Just following up. I just realized that the SalesForce case below has been closed. The support case owner was correctly able to identify the root cause as being the same problem as the one I mentioned below. The fix will be in the upcoming
5.1.7.0 release.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for opening the case and working with the support team on this one.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> Felipe<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">----<o:p></o:p></p>
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<p class="MsoNormal">Felipe Knop <a href="mailto:knop@us.ibm.com">knop@us.ibm.com</a><br>
GPFS Development and Security<br>
IBM Systems<br>
IBM Building 008<br>
2455 South Rd, Poughkeepsie, NY 12601<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></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 <<a href="mailto:gpfsug-discuss-bounces@gpfsug.org">gpfsug-discuss-bounces@gpfsug.org</a>> on behalf of Walter Sklenka
<<a href="mailto:Walter.Sklenka@EDV-Design.at">Walter.Sklenka@EDV-Design.at</a>><br>
<b>Reply-To: </b>gpfsug main discussion list <<a href="mailto:gpfsug-discuss@gpfsug.org">gpfsug-discuss@gpfsug.org</a>><br>
<b>Date: </b>Wednesday, February 22, 2023 at 5:23 AM<br>
<b>To: </b>gpfsug main discussion list <<a href="mailto:gpfsug-discuss@gpfsug.org">gpfsug-discuss@gpfsug.org</a>><br>
<b>Subject: </b>[EXTERNAL] Re: [gpfsug-discuss] Reasons for DiskLeaseThread Overloaded<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" style="mso-line-height-alt:.75pt"><span style="font-size:1.0pt;color:white">Hi ; sorry for the delay Our case is TS012184140 They are still analizing As soon as I get feedback I will update you Mit freundlichen Grüßen Walter Sklenka Technical
Consultant EDV-Design Informationstechnologie GmbH Giefinggasse 6/1/2, A-1210 <o:p>
</o:p></span></p>
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<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span style="font-size:1.0pt;color:white">ZjQcmQRYFpfptBannerStart<o:p></o:p></span></p>
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<p class="MsoNormal">Hi ; sorry for the delay <o:p></o:p></p>
<p class="MsoNormal">Our case is TS012184140 <o:p></o:p></p>
<p class="MsoNormal">They are still analizing <o:p></o:p></p>
<p class="MsoNormal">As soon as I get feedback I will update you <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span lang="DE-AT" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Mit freundlichen Grüßen<br>
<b><i>Walter Sklenka</i></b><br>
</span><b><i><span lang="DE-AT" style="font-size:8.0pt;font-family:"Arial",sans-serif;color:gray">Technical Consultant</span></i></b><span lang="DE-AT" style="color:black">
</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="DE-AT" style="font-size:12.0pt;font-family:"Times New Roman",serif;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="DE-AT" style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black">EDV-Design Informationstechnologie GmbH<br>
Giefinggasse 6/1/2, A-1210 Wien<br>
Tel: +43 1 29 22 165-31<br>
Fax: +43 1 29 22 165-90<br>
E-Mail: <a href="mailto:sklenka@edv-design.at" target="_blank"><span style="color:#0563C1">sklenka@edv-design.at</span></a></span><span lang="DE-AT" style="font-size:8.0pt;color:black"><br>
</span><span lang="DE-AT" style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black">Internet:
<a href="http://www.edv-design.at/" target="_blank"><span style="color:#0563C1">www.edv-design.at</span></a></span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="DE"> </span><o:p></o:p></p>
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<p class="MsoNormal"><b><span lang="DE">Von:</span></b><span lang="DE"> gpfsug-discuss <<a href="mailto:gpfsug-discuss-bounces@gpfsug.org">gpfsug-discuss-bounces@gpfsug.org</a>>
<b>Im Auftrag von </b>Ryan Novosielski<br>
<b>Gesendet:</b> Friday, February 17, 2023 11:52 PM<br>
<b>An:</b> gpfsug main discussion list <<a href="mailto:gpfsug-discuss@gpfsug.org">gpfsug-discuss@gpfsug.org</a>><br>
<b>Betreff:</b> Re: [gpfsug-discuss] Reasons for DiskLeaseThread Overloaded</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">I talked about it a lot in TS011616986. <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Part of the problem is we’re having a lot of strange problems at the same time, and so the different issues we’re having often come together (like one cause shows two symptoms).<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">I can’t remember if there was a case where I specifically mentioned the watchdog, or whether it was unexpectedly late lease times in general.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="color:black">--<br>
#BlackLivesMatter</span><o:p></o:p></p>
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<div>
<p class="MsoNormal"><span style="color:black">____<br>
|| <a href="file:///UTGERS">\\UTGERS</a>, <span class="apple-tab-span"> </span> |---------------------------*O*---------------------------<br>
||_// the State<span class="apple-tab-span"> </span> | Ryan Novosielski - <a href="mailto:novosirj@rutgers.edu">novosirj@rutgers.edu</a><br>
|| \\ University | Sr. Technologist - 973/972.0922 (2x0922) ~*~ RBHS Campus<br>
|| \\ of NJ<span class="apple-tab-span"> </span> | Office of Advanced Research Computing - MSB C630, Newark<br>
`'</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<p class="MsoNormal">On Feb 17, 2023, at 04:43, Walter Sklenka <<a href="mailto:Walter.Sklenka@EDV-Design.at">Walter.Sklenka@EDV-Design.at</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Hi Ryan and Felipe!<o:p></o:p></p>
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<p class="MsoNormal">Could you eventually tell me the case number if you remember it?<o:p></o:p></p>
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<p class="MsoNormal">I opened the case and would reference to your case ID<o:p></o:p></p>
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<p class="MsoNormal">Or shall I send you mine ?<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b><span class="apple-converted-space"> </span>gpfsug-discuss <<a href="mailto:gpfsug-discuss-bounces@gpfsug.org">gpfsug-discuss-bounces@gpfsug.org</a>><span class="apple-converted-space"> </span><b>On Behalf Of<span class="apple-converted-space"> </span></b>Ryan
Novosielski<br>
<b>Sent:</b><span class="apple-converted-space"> </span>Freitag, 17. Februar 2023 06:43<br>
<b>To:</b><span class="apple-converted-space"> </span>gpfsug main discussion list <<a href="mailto:gpfsug-discuss@gpfsug.org">gpfsug-discuss@gpfsug.org</a>><br>
<b>Subject:</b><span class="apple-converted-space"> </span>Re: [gpfsug-discuss] Reasons for DiskLeaseThread Overloaded<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Thanks for this, Felipe.<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal">We’ve started seeing intermittent overdue leases in large numbers and don’t otherwise have an explanation for it, other than “look at your network,” which actually does show occasional signs of strange behavior/higher-than-normal RTO values,
but we’re not necessarily seeing those things happen at the same times as the lease issues. We’ve also seen “GPFS Critical Thread Watchdog” recently.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">We had a case open about it, but didn’t draw any real conclusions. If any of our data might be helpful/if there’s a case we could reference to see if we’re also running into that, we could provide a gpfs.snap.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">FWIW, we are running 5.1.3-1 on the storage side (except one system that’s about to be upgraded that runs a combination of 5.0.3-2 and 5.0.5-1), and 5.1.6-0 (soon to be 5.1.6-1) on the remote/client cluster side.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">--<br>
#BlackLivesMatter<o:p></o:p></p>
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<p class="MsoNormal">____<br>
|| <a href="file:///utgers/">\\UTGERS</a>, <span class="apple-converted-space"> </span> |---------------------------*O*---------------------------<br>
||_// the State<span class="apple-converted-space"> </span> | Ryan Novosielski - <a href="mailto:novosirj@rutgers.edu">novosirj@rutgers.edu</a><br>
|| \\ University | Sr. Technologist - 973/972.0922 (2x0922) ~*~ RBHS Campus<br>
|| \\ of NJ<span class="apple-converted-space"> </span> | Office of Advanced Research Computing - MSB C630, Newark<br>
`'<o:p></o:p></p>
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<p class="MsoNormal">On Feb 16, 2023, at 12:02, Felipe Knop <<a href="mailto:knop@us.ibm.com">knop@us.ibm.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Walter,<o:p></o:p></p>
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<p class="MsoNormal">Thanks for the detailed description.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">I don’t yet see anything glaringly incorrect on your configuration, but perhaps others might find something out of place.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">I’d encourage you to open a case, since I spoke with a colleague yesterday, and he mentioned that he is working on a problem that may cause the lease thread to “loop” for a while. That might cause the critical thread watchdog to flag the
lease thread as taking too long to “check in”.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Capturing gpfs.snap is important, since we’d be looking into all the<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">[W] ------------------[GPFS Critical Thread Watchdog]------------------</span><o:p></o:p></p>
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<p class="MsoNormal">instances.<o:p></o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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<p class="MsoNormal"> Felipe<o:p></o:p></p>
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<p class="MsoNormal">----<o:p></o:p></p>
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<p class="MsoNormal">Felipe Knop <a href="mailto:knop@us.ibm.com"><span style="color:#0563C1">knop@us.ibm.com</span></a><br>
GPFS Development and Security<br>
IBM Systems<br>
IBM Building 008<br>
2455 South Rd, Poughkeepsie, NY 12601<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt">From:<span class="apple-converted-space"> </span></span></b><span style="font-size:12.0pt">gpfsug-discuss <<a href="mailto:gpfsug-discuss-bounces@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss-bounces@gpfsug.org</span></a>>
on behalf of Walter Sklenka <<a href="mailto:Walter.Sklenka@EDV-Design.at"><span style="color:#0563C1">Walter.Sklenka@EDV-Design.at</span></a>><br>
<b>Reply-To:<span class="apple-converted-space"> </span></b>gpfsug main discussion list <<a href="mailto:gpfsug-discuss@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss@gpfsug.org</span></a>><br>
<b>Date:<span class="apple-converted-space"> </span></b>Thursday, February 16, 2023 at 9:16 AM<br>
<b>To:<span class="apple-converted-space"> </span></b>gpfsug main discussion list <<a href="mailto:gpfsug-discuss@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss@gpfsug.org</span></a>><br>
<b>Subject:<span class="apple-converted-space"> </span></b>[EXTERNAL] Re: [gpfsug-discuss] Reasons for DiskLeaseThread Overloaded</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:1.0pt;color:white">Hi Felipe! Once again me. Thank you very much for the hint I did not open a PMR yet because I fear they will ask me/us if we are cracy<span class="apple-converted-space"> </span></span><span style="font-size:1.0pt;font-family:"Segoe UI Emoji",sans-serif;color:white">☹</span><span class="apple-converted-space"><span style="font-size:1.0pt;color:white"> </span></span><span style="font-size:1.0pt;color:white">I
did not tell the full story yet We have a 3 node cluster, 2 NSD servers o1,o2 (same site ) and g1 (different</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif">This message came from outside your organization.</span><o:p></o:p></p>
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<p class="MsoNormal">Hi Felipe!<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal">Once again me. Thank you very much for the hint<o:p></o:p></p>
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<p class="MsoNormal">I did not open a PMR yet because I fear they will ask me/us if we are cracy<span class="apple-converted-space"> </span><span style="font-family:"Segoe UI Emoji",sans-serif">☹</span><span class="apple-converted-space"> </span> <o:p></o:p></p>
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<p class="MsoNormal">I did not tell the full story yet<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal">We have a 3 node cluster, 2 NSD servers o1,o2 (same site ) and g1 (different site). (rhel 8.7)<o:p></o:p></p>
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<p class="MsoNormal">All of them are Vmware VMs<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal">O1 and o2 have each 4 NVME drives passed through , there is a software raid 5 made over these NVMEs , and from them made a single NSD , for a filesystem fs4vm (m,r=2 )<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">[root@ogpfs1 ras]# mmlscluster</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">GPFS cluster information</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">========================</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> GPFS cluster name: edvdesign-cluster.local</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> GPFS cluster id: 12147978822727803186</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> GPFS UID domain: edvdesign-cluster.local</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> Remote shell command: /usr/bin/ssh</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> Remote file copy command: /usr/bin/scp</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> Repository type: CCR</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">Node Daemon node name IP address Admin node name Designation</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">----------------------------------------------------------------------------</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> 1 ogpfs1-hs.local 10.20.30.1 ogpfs1-hs.local quorum-manager-perfmon</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> 2 ogpfs2-hs.local 10.20.30.2 ogpfs2-hs.local quorum-manager-perfmon</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> 3 ggpfsq.mgmt.cloudia <span class="apple-converted-space"> </span><a href="http://xxxx.other.net/"><span style="color:#0563C1">xxxx.other.net</span></a><span class="apple-converted-space"> </span>ggpfsq.mgmt.
a quorum-perfmon</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">[root@ogpfs1 ras]# mmlsconfig</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">Configuration data for cluster edvdesign-cluster.local:</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">-------------------------------------------------------</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">clusterName edvdesign-cluster.local</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">clusterId 12147978822727803186</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">autoload yes</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">tscCmdAllowRemoteConnections no</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">verbsRdma enable</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">[common]</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">verbsRdmaCm enable</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">[srv]</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">pagepool 32G</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">[common]</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">File systems in cluster edvdesign-cluster.local:</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">------------------------------------------------</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">/dev/fs4vm</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">[root@ogpfs1 ras]# mmlsdisk fs4vm -L</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">disk driver sector failure holds holds storage</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">name type size group metadata data status availability disk id pool remarks</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">------------ -------- ------ ----------- -------- ----- ------------- ------------ ------- ------------ ---------</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">ogpfs1_1 nsd 512 1 yes yes ready up 1 system desc</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">ogpfs2_1 nsd 512 2 yes yes ready up 2 system desc</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">ggpfsq_qdisk nsd 512 -1 no no ready up 3 system desc</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">Number of quorum disks: 3</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">Read quorum value: 2</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">Write quorum value: 2</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">And the two nodes o1 and o2 export the filesystem via CES NFS functions ( for VMware)<o:p></o:p></p>
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<p class="MsoNormal">I think this isn´supported , that a NSD Server is also a CES Node?<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">And finally the RDMA Network :<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal">The both NSD servers also have a Mellanox ConnectX-6 Lx dual port 25Gb adapter also via passthrough<o:p></o:p></p>
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<p class="MsoNormal">And these interfaces we configured for rdma (RoCE) ,<o:p></o:p></p>
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<p class="MsoNormal">Last but not least: this network is not switched but direct attached ( 2x25Gb directly connected between the NSD nodes )<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">RDMA Connections between nodes:</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> Fabric 0 - Device mlx5_0 Port 1 Width 1x Speed EDR lid 0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> hostname idx CM state VS buff RDMA_CT(ERR) RDMA_RCV_MB RDMA_SND_MB VS_CT(ERR) VS_SND_MB VS_RCV_MB WAIT_CON_SLOT WAIT_NODE_SLOT</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> ogpfs2-hs.local 0 Y RTS (Y)256 478202 (0 ) 12728 67024 8864789(0 ) 22776 4643 0 0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> Fabric 0 - Device mlx5_1 Port 1 Width 1x Speed EDR lid 0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> hostname idx CM state VS buff RDMA_CT(ERR) RDMA_RCV_MB RDMA_SND_MB VS_CT(ERR) VS_SND_MB VS_RCV_MB WAIT_CON_SLOT WAIT_NODE_SLOT</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> ogpfs2-hs.local 1 Y RTS (Y)256 477659 (0 ) 12489 67034 8864773(0 ) 22794 4639 0 0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">[root@ogpfs1 ras]#</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> </span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">You mentioned that it might be a cpu contention : Maybe due to the VM layer (scheduling with other VMS) ? And wrong layout of VMs ( 8 vCPUs and 64GB Mem) [ esxis only single socket with 32/64 cores HT)<o:p></o:p></p>
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<p class="MsoNormal">And also the direct attached RDMA ( +DAEMON) network is also not good?<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Do you think IBM would say no to check such a configuration ?<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Best regards<o:p></o:p></p>
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<p class="MsoNormal">Walter<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b><span class="apple-converted-space"> </span>gpfsug-discuss <<a href="mailto:gpfsug-discuss-bounces@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss-bounces@gpfsug.org</span></a>><span class="apple-converted-space"> </span><b>On
Behalf Of<span class="apple-converted-space"> </span></b>Felipe Knop<br>
<b>Sent:</b><span class="apple-converted-space"> </span>Mittwoch, 15. Februar 2023 15:59<br>
<b>To:</b><span class="apple-converted-space"> </span>gpfsug main discussion list <<a href="mailto:gpfsug-discuss@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss@gpfsug.org</span></a>><br>
<b>Subject:</b><span class="apple-converted-space"> </span>Re: [gpfsug-discuss] Reasons for DiskLeaseThread Overloaded<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Walter,<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Thanks for the details.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">The stack trace below captures the lease thread in the middle of sending the “lease” RPC. This operation normally is not blocking, and we do not often block while sending the RPC. But the stack trace “does not show” whether there was anything
blocking the thread prior to the point where the RPCs are sent.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">At a first glance:<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.430+0100: [W] counter: 0 (mark-idle: 0 mark-active: 0 pre-work: 0 post-work: 0) sched: (nvcsw: 0 nivcsw: 10)</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">I believe<span class="apple-converted-space"><b> </b></span><b>nivcsw: 10</b><span class="apple-converted-space"> </span>means that the thread was scheduled out of the CPU involuntarily, possibly indicating that there is some CPU contention
going on.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Could you open a case to get debug data collected? If the problem can be recreated, I think we’ll need a recreate of the problem with traces enabled.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"> Felipe<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">----<o:p></o:p></p>
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<p class="MsoNormal">Felipe Knop <a href="mailto:knop@us.ibm.com"><span style="color:#0563C1">knop@us.ibm.com</span></a><br>
GPFS Development and Security<br>
IBM Systems<br>
IBM Building 008<br>
2455 South Rd, Poughkeepsie, NY 12601<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt">From:<span class="apple-converted-space"> </span></span></b><span style="font-size:12.0pt">gpfsug-discuss <<a href="mailto:gpfsug-discuss-bounces@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss-bounces@gpfsug.org</span></a>>
on behalf of Walter Sklenka <<a href="mailto:Walter.Sklenka@EDV-Design.at"><span style="color:#0563C1">Walter.Sklenka@EDV-Design.at</span></a>><br>
<b>Reply-To:<span class="apple-converted-space"> </span></b>gpfsug main discussion list <<a href="mailto:gpfsug-discuss@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss@gpfsug.org</span></a>><br>
<b>Date:<span class="apple-converted-space"> </span></b>Wednesday, February 15, 2023 at 4:23 AM<br>
<b>To:<span class="apple-converted-space"> </span></b>gpfsug main discussion list <<a href="mailto:gpfsug-discuss@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss@gpfsug.org</span></a>><br>
<b>Subject:<span class="apple-converted-space"> </span></b>[EXTERNAL] Re: [gpfsug-discuss] Reasons for DiskLeaseThread Overloaded</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:1.0pt;color:white">Hi! This is a „full“ sequence in mmfs. log. latest Fortunately this was also the last event until now (yesterday evening) Maybe you can have a look? 2023-02-14_19: 43: 51. 474+0100: [N] Disk lease
period expired 0. 030 seconds ago in cluster<span class="apple-converted-space"> </span></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:1.0pt;color:white">ZjQcmQRYFpfptBannerStart</span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:10.5pt;font-family:"Arial",sans-serif">This Message Is From an External Sender</span></b><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif">This message came from outside your organization.</span><o:p></o:p></p>
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<p class="MsoNormal">Hi!<o:p></o:p></p>
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<p class="MsoNormal">This is a „full“ sequence in mmfs.log.latest<o:p></o:p></p>
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<p class="MsoNormal">Fortunately this was also the last event until now (yesterday evening)<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Maybe you can have a look?<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:43:51.474+0100: [N] Disk lease period expired 0.030 seconds ago in cluster xxx-cluster. Attempting to reacquire the lease.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.430+0100: [W] ------------------[GPFS Critical Thread Watchdog]------------------</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.430+0100: [W] PID: 7294 State: R (DiskLeaseThread) is overloaded for more than 8 seconds</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.430+0100: [W] counter: 0 (mark-idle: 0 mark-active: 0 pre-work: 0 post-work: 0) sched: (nvcsw: 0 nivcsw: 10)</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.430+0100: [W] Call Trace(PID: 7294):</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.431+0100: [W] #0: 0x000055CABE4A56AB NodeConn::sendMessage(TcpConn**, iovec*, int, unsigned char, int, int, int, unsigned int, DestTag*, int*, unsigned long long*,
unsigned long long*, unsi</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">gned int*, CondvarName, vsendCallback_t*) + 0x42B at ??:0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.432+0100: [W] #1: 0x000055CABE4A595F llc_send_msg(ClusterConfiguration*, NodeAddr, iovec*, int, unsigned char, int, int, int, unsigned int, DestTag*, int*, TcpConn**,
unsigned long long*, u</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">nsigned long long*, unsigned int*, CondvarName, vsendCallback_t*, int, unsigned int) + 0xDF at ??:0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.437+0100: [W] #2: 0x000055CABE479A55 MsgRecord::send() + 0x1345 at ??:0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.438+0100: [W] #3: 0x000055CABE47A169 tscSendInternal(ClusterConfiguration*, unsigned int, unsigned char, int, int, NodeAddr*, TscReply*, TscScatteredBuff*, int,
int (*)(void*, ClusterConfig</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">uration*, int, NodeAddr*, TscReply*), void*, ChainedCallback**, __va_list_tag*) + 0x339 at ??:0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.439+0100: [W] #4: 0x000055CABE47C39A tscSendWithCallback(ClusterConfiguration*, unsigned int, unsigned char, int, NodeAddr*, TscReply*, int (*)(void*, ClusterConfiguration*,
int, NodeAddr*,</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">TscReply*), void*, void**, int, ...) + 0x1DA at ??:0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.440+0100: [W] #5: 0x000055CABE5F9853 MyLeaseState::renewLease(NodeAddr, TickTime) + 0x6E3 at ??:0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.440+0100: [W] #6: 0x000055CABE5FA682 ClusterConfiguration::checkAndRenewLease(TickTime) + 0x192 at ??:0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.441+0100: [W] #7: 0x000055CABE5FAAC6 ClusterConfiguration::RunLeaseChecks(void*) + 0x366 at ??:0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.441+0100: [W] #8: 0x000055CABDF2B662 Thread::callBody(Thread*) + 0x42 at ??:0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.441+0100: [W] #9: 0x000055CABDF18680 Thread::callBodyWrapper(Thread*) + 0xA0 at ??:0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.441+0100: [W] #10: 0x00007F3B7563D1CA start_thread + 0xEA at ??:0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:07.441+0100: [W] #11: 0x00007F3B7435BE73 __GI___clone + 0x43 at ??:0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:10.512+0100: [N] Disk lease reacquired in cluster xxx-cluster.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:10.512+0100: [N] Disk lease period expired 7.970 seconds ago in cluster xxx-cluster. Attempting to reacquire the lease.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">2023-02-14_19:44:12.563+0100: [N] Disk lease reacquired in cluster xxx-cluster.</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Thank you very much!<o:p></o:p></p>
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<p class="MsoNormal">Best regards<o:p></o:p></p>
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<p class="MsoNormal">Walter<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b><span class="apple-converted-space"> </span>gpfsug-discuss <<a href="mailto:gpfsug-discuss-bounces@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss-bounces@gpfsug.org</span></a>><span class="apple-converted-space"> </span><b>On
Behalf Of<span class="apple-converted-space"> </span></b>Felipe Knop<br>
<b>Sent:</b><span class="apple-converted-space"> </span>Mittwoch, 15. Februar 2023 00:06<br>
<b>To:</b><span class="apple-converted-space"> </span>gpfsug main discussion list <<a href="mailto:gpfsug-discuss@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss@gpfsug.org</span></a>><br>
<b>Subject:</b><span class="apple-converted-space"> </span>Re: [gpfsug-discuss] Reasons for DiskLeaseThread Overloaded<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">All,<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">These messages like<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">[W] ------------------[GPFS Critical Thread Watchdog]------------------</span><o:p></o:p></p>
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<p class="MsoNormal">indicate that a “critical thread”, in this case the lease thread, was apparently blocked for longer than expected. This is usually not caused by delays in the network, but possibly by excessive CPU load, blockage while accessing the local
file system, or possible mutex contention.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Do you have other samples of the message, with a more complete stack trace? Or was the instance below the only one?<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"> Felipe<o:p></o:p></p>
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<p class="MsoNormal">----<o:p></o:p></p>
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<p class="MsoNormal">Felipe Knop <a href="mailto:knop@us.ibm.com"><span style="color:#0563C1">knop@us.ibm.com</span></a><br>
GPFS Development and Security<br>
IBM Systems<br>
IBM Building 008<br>
2455 South Rd, Poughkeepsie, NY 12601<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt">From:<span class="apple-converted-space"> </span></span></b><span style="font-size:12.0pt">gpfsug-discuss <<a href="mailto:gpfsug-discuss-bounces@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss-bounces@gpfsug.org</span></a>>
on behalf of Walter Sklenka <<a href="mailto:Walter.Sklenka@EDV-Design.at"><span style="color:#0563C1">Walter.Sklenka@EDV-Design.at</span></a>><br>
<b>Reply-To:<span class="apple-converted-space"> </span></b>gpfsug main discussion list <<a href="mailto:gpfsug-discuss@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss@gpfsug.org</span></a>><br>
<b>Date:<span class="apple-converted-space"> </span></b>Tuesday, February 14, 2023 at 10:49 AM<br>
<b>To:<span class="apple-converted-space"> </span></b>"<a href="mailto:gpfsug-discuss@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss@gpfsug.org</span></a>" <<a href="mailto:gpfsug-discuss@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss@gpfsug.org</span></a>><br>
<b>Subject:<span class="apple-converted-space"> </span></b>[EXTERNAL] Re: [gpfsug-discuss] Reasons for DiskLeaseThread Overloaded</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:1.0pt;color:white">Hi! I started with 5. 1. 6. 0 and now am at [root@ ogpfs1 ~]# mmfsadm dump version Dump level: verbose Build branch "5. 1. 6. 1 ". the messages started from the beginning From: gpfsug-discuss <gpfsug-discuss-bounces@ gpfsug. org>
On<span class="apple-converted-space"> </span></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:1.0pt;color:white">ZjQcmQRYFpfptBannerStart</span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:10.5pt;font-family:"Arial",sans-serif">This Message Is From an External Sender</span></b><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif">This message came from outside your organization.</span><o:p></o:p></p>
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<p class="MsoNormal">Hi!<o:p></o:p></p>
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<p class="MsoNormal">I started with 5.1.6.0 and now am at [root@ogpfs1 ~]# mmfsadm dump version<o:p></o:p></p>
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<p class="MsoNormal">Dump level: verbose<o:p></o:p></p>
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<p class="MsoNormal">Build branch "5.1.6.1 ".<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">the messages started from the beginning<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b><span class="apple-converted-space"> </span>gpfsug-discuss <<a href="mailto:gpfsug-discuss-bounces@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss-bounces@gpfsug.org</span></a>><span class="apple-converted-space"> </span><b>On
Behalf Of<span class="apple-converted-space"> </span></b>Christian Vieser<br>
<b>Sent:</b><span class="apple-converted-space"> </span>Dienstag, 14. Februar 2023 15:34<br>
<b>To:</b><span class="apple-converted-space"> </span><a href="mailto:gpfsug-discuss@gpfsug.org"><span style="color:#0563C1">gpfsug-discuss@gpfsug.org</span></a><br>
<b>Subject:</b><span class="apple-converted-space"> </span>Re: [gpfsug-discuss] Reasons for DiskLeaseThread Overloaded<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p><span style="font-size:8.5pt;font-family:Menlo-Regular">What version of Spectrum Scale is running there? Do these errors appear since your last version update?</span><o:p></o:p></p>
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<p class="MsoNormal">Am 14.02.23 um 14:09 schrieb Walter Sklenka:<o:p></o:p></p>
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<p class="MsoNormal">Dear Collegues!<o:p></o:p></p>
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<p class="MsoNormal">May I ask if anyone has a hint what could be the reason for Critical Thread Watchdog warnings for Disk Leases Threads?<o:p></o:p></p>
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<p class="MsoNormal">Is this a “local node” Problem or a network problem ?<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal">I see these messages sometimes arriving when NSD Servers which also serve as NFS servers when they get under heavy NFS load<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">Following is an excerpt from mmfs.log.latest</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_12:06:53.235+0100: [N] Disk lease period expired 0.040 seconds ago in cluster xxx-cluster. Attempting to reacquire the lease.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_12:06:53.600+0100: [W] ------------------[GPFS Critical Thread Watchdog]------------------</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_12:06:53.600+0100: [W] PID: 7294 State: R (DiskLeaseThread) is overloaded for more than 8 seconds</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_12:06:53.600+0100: [W] counter: 0 (mark-idle: 0 mark-active: 0 pre-work: 0 post-work: 0) sched: (nvcsw: 0 nivcsw: 8)</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_12:06:53.600+0100: [W] Call Trace(PID: 7294):</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_12:06:53.600+0100: [W] #0: 0x000055CABDF49521 BaseMutexClass::release() + 0x12 at ??:0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_12:06:53.600+0100: [W] #1: 0xB1557721BBABD900 _etext + 0xB154F7E646041C0E at ??:0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_12:07:09.554+0100: [N] Disk lease reacquired in cluster xxx-cluster.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_12:07:09.554+0100: [N] Disk lease period expired 5.680 seconds ago in cluster xxx-cluster. Attempting to reacquire the lease.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_12:07:11.605+0100: [N] Disk lease reacquired in cluster xxx-cluster.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_12:10:55.990+0100: [I] Command: mmlspool /dev/fs4vm all -L -Y</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_12:10:55.990+0100: [I] Command: successful mmlspool /dev/fs4vm all -L -Y</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_12:30:58.756+0100: [I] Command: mmlspool /dev/fs4vm all -L -Y</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_12:30:58.756+0100: [I] Command: successful mmlspool /dev/fs4vm all -L -Y</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_13:10:55.988+0100: [I] Command: mmlspool /dev/fs4vm all -L -Y</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_13:10:55.989+0100: [I] Command: successful mmlspool /dev/fs4vm all -L -Y</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_13:21:40.892+0100: [N] Node 10.20.30.2 (ogpfs2-hs.local) lease renewal is overdue. Pinging to check if it is alive</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_13:21:40.892+0100: [I] The TCP connection to IP address 10.20.30.2 ogpfs2-hs.local <c0n1>:[1] (socket 106) state: state=1 ca_state=0 snd_cwnd=10 snd_ssthresh=2147483647 unacked=0 probes=0
backoff=0 retransmits=0 rto=201000 rcv_ssthresh=1219344 rtt=121 rttvar=69 sacked=0 retrans=0 reordering=3 lost=0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_13:22:00.220+0100: [N] Disk lease period expired 0.010 seconds ago in cluster xxx-cluster. Attempting to reacquire the lease.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_13:22:08.298+0100: [N] Disk lease reacquired in cluster xxx-cluster.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_13:30:58.760+0100: [I] Command: mmlspool /dev/fs4vm all -L -Y</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">2023-02-14_13:30:58.760+0100: [I] Command: successful mmlspool /dev/fs4vm all -L -Y</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Mit freundlichen Grüßen<br>
<b><i>Walter Sklenka</i></b><br>
</span><b><i><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:gray">Technical Consultant</span></i></b><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.5pt;font-family:Menlo-Regular">_______________________________________________<br>
gpfsug-discuss mailing list<br>
gpfsug-discuss at<span class="apple-converted-space"> </span></span><a href="http://gpfsug.org/"><span style="font-size:8.5pt;font-family:Menlo-Regular;color:#0563C1">gpfsug.org</span></a><span style="font-size:8.5pt;font-family:Menlo-Regular"><br>
</span><a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss_gpfsug.org"><span style="font-size:8.5pt;font-family:Menlo-Regular;color:#0563C1">http://gpfsug.org/mailman/listinfo/gpfsug-discuss_gpfsug.org</span></a><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:8.5pt;font-family:Menlo-Regular">_______________________________________________<br>
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