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<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Thanks a lot for this clear answer Andrey !<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">All the best,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">JF<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Andriy Kurilin <andr.kurilin@gmail.com>
<br>
<b>Sent:</b> dimanche, 6 août 2023 20:38<br>
<b>To:</b> Taltavull Jean-François <jean-francois.taltavull@elca.ch><br>
<b>Cc:</b> openstack-discuss@lists.openstack.org<br>
<b>Subject:</b> Re: [RALLY] Running Rally tasks and Tempest tests in multi-user context<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:7.5pt"><strong><i><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:red">EXTERNAL MESSAGE
</span></i></strong><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">- This email comes from
<strong><span style="font-family:"Arial",sans-serif">outside ELCA companies</span></strong>.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">hi!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">чт, 3 авг. 2023 г. в 18:22, Taltavull Jean-François <<a href="mailto:jean-francois.taltavull@elca.ch" target="_blank">jean-francois.taltavull@elca.ch</a>>:<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Hi openstack-discuss,<br>
<br>
I’m currently using Rally v3.4.0 to test our OpenStack Zed platform.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Rally has been deployed on a dedicated virtual machine and Rally tasks and Tempest tests, launched on this machine by Rundeck, run pretty well.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Now, I wish every OpenStack team member could launch whatever scenario or test he wants, when he wants, for example after having applied a service configuration
change on the staging platform.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">And a question is arising: can several users launch different Rally scenarios or Tempest tests at the same time, from their own Linux account/environment, using
the same Rally, the one which is deployed on the dedicated machine ?</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Rally Task framework itself does not have limitations for parallel executions.<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="gmail-rynqvb"><span lang="EN" style="font-size:10.0pt">But it is worth considering a few nuances:</span></span><span style="font-size:10.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"><span class="gmail-rynqvb"><span lang="EN" style="font-size:10.0pt">- Database backend. Rally is configured to use
</span></span><span style="font-size:10.0pt">SQLite by default. It does not support simultaneous write operations, which can be an issue for using a dedicated rally instance for running parallel tasks. Switching to MySQL/Postgres should not have such an issue.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">- File descriptions. If you run too many parallel tasks with a huge number of parallel iterations, you may face default linux limitation of open file descriptors.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">I never ran Tempest simultaneously for the same cloud, so I cannot guarantee that there are no bugs, but it should be ok in general.<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Thanks and best regards,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Jean-Francois</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
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<br>
</span><o:p></o:p></p>
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<span class="gmailsignatureprefix">-- </span><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Best regards,<br>
Andrey Kurilin.<o:p></o:p></span></p>
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