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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We are planning to integrate new IBM Spectrum Scale version 4.2.3 into our software, but in our current software release we have version 4.1.1 integrated. We are worried how would node-at-a-time updates look like when our customer wanted
to update his cluster from 4.1.1 to 4.2.3 version.<o:p></o:p></p>
<p class="MsoNormal">According to “Concepts, Planning and Installation Guide” (for 4.2.3), there’s a limited compatibility between two GPFS versions and if they’re not adjacent, then following update path is advised:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">“If you want to migrate to an IBM Spectrum Scale version that is not an adjacent release of your current<o:p></o:p></p>
<p class="MsoNormal">version (for example, version 4.1.1.x to version 4.2.3), you can follow this migration path depending on<o:p></o:p></p>
<p class="MsoNormal">your current version:<o:p></o:p></p>
<p class="MsoNormal">V 3.5 > V 4.1.0.x > V 4.1.1.x > V 4.2.0.x > V 4.2.1.x > V 4.2.2.x > V 4.2.3.x”<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My question is: is the above statement true even though on nodes where new GPFS 4.2.3 is installed these nodes will not be migrated to latest release with “mmchconfig release=LATEST” until all nodes in the cluster will have been updated
to version 4.2.3? <o:p></o:p></p>
<p class="MsoNormal">In other words: can two nodes, one with GPFS version 4.1.1 and the other with version 4.2.3, coexist in the cluster, where nodes have not been migrated to 4.2.3 (i.e. filesystem level is still at version 4.1.1)?<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">Tomasz Wolski<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="DE" style="font-size:10.0pt;font-family:"Fujitsu Sans","sans-serif";color:#1F497D">With best regards / Mit freundlichen Grüßen / Pozdrawiam<b><o:p></o:p></b></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="DE" style="font-size:10.0pt;font-family:"Fujitsu Sans","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Fujitsu Sans","sans-serif";color:#1F497D">Tomasz Wolski<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Fujitsu Sans","sans-serif";color:#1F497D">Development Engineer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Fujitsu Sans","sans-serif";color:#1F497D">NDC Eternus CS HE (ET2)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><img width="81" height="60" id="Picture_x0020_1" src="cid:image001.gif@01D2D8CA.2803D960" alt="cid:image002.gif@01CE62B9.8ACFA960"></span><span lang="PL" style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:10.0pt;font-family:"Fujitsu Sans","sans-serif";color:#1F497D">FUJITSU<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Fujitsu Sans","sans-serif";color:#1F497D">Fujitsu Technology Solutions Sp. z o.o.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Fujitsu Sans","sans-serif";color:#1F497D">Textorial Park Bldg C, ul.
</span><span lang="PL" style="font-size:10.0pt;font-family:"Fujitsu Sans","sans-serif";color:#1F497D">Fabryczna 17<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PL" style="font-size:10.0pt;font-family:"Fujitsu Sans","sans-serif";color:#1F497D">90-344 Lodz, Poland<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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