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<p class="MsoNormal"><span style="font-size:11.0pt">I assisted in a migration a couple years ago when we pushed teams to RHEL 7 and the science pipeline folks weren’t really concerned with the version of Scale we were using, but more what the new OS did to
their code stack with the newer version of things like gcc and other libraries. They ended up re-running pipelines from prior data releases to compare the outputs of the pipelines to make sure they were within tolerance and matched prior results.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Best,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">J.D. Maloney<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">HPC Storage Engineer | Storage Enabling Technologies Group<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">National Center for Supercomputing Applications (NCSA)<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="color:black">From: </span></b><span style="color:black"><gpfsug-discuss-bounces@spectrumscale.org> on behalf of "Carl Zetie - carlz@us.ibm.com" <carlz@us.ibm.com><br>
<b>Reply-To: </b>gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><br>
<b>Date: </b>Thursday, February 20, 2020 at 10:42 AM<br>
<b>To: </b>"gpfsug-discuss@spectrumscale.org" <gpfsug-discuss@spectrumscale.org><br>
<b>Subject: </b>Re: [gpfsug-discuss] GPFS 5 and supported rhel OS (Ken Atkinson)<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif">Ken wrote:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif">> It may be that some HPC users "have to"</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif">> reverify the results of their computations as being exactly the same as a</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif">> previous software stack and that is not a minor task. Any change may</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif">> require this verification process.....</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif">How deep does “any change” go? Mod level? PTF? Efix? OS errata?
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif">Many of our enterprise customers also have validation requirements, although not as strict as typical HPC users e.g. they require some level of testing if they take a Mod but
not a PTF. Mind you, with more HPC-like workloads showing up in the enterprise, that too might change…</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif">Thanks,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="text-align:justify"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:black">Carl Zetie</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:black">Program Director</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:black">Offering Management
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:black">Spectrum Scale & Spectrum Discover</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:black">----</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:black">(919) 473 3318 ][ Research Triangle Park</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:black">carlz@us.ibm.com</span><o:p></o:p></p>
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