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Below is a summary of yesterday's Maintenance Day changes that may affect you:<br>
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The DNS alias ifarm.jlab.org now points to two new AlmaLinux (EL9) nodes with a substantial upgrade in memory and CPU. We recommend ssh-ing to ifarm.jlab.org rather than individual hostnames. <br>
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<div>A single CentOS 7 (EL7) node, ifarm1901, will remain online for legacy code transitions until the August 20<sup>th</sup> Maintenance day at which point it will be shutdown.</div>
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<div>ssh keys have changed for ifarm.jlab.org. In this case, it is acceptable to remove the old key using "ssh-keygen -R
<i>hostname</i>" </div>
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To complete the AlmaLinux migration in SLURM, the <code>el7</code> feature has been removed.
<b><i>This may require modification to your SLURM job submissions</i></b>. Here is how to plan now for the change:</div>
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<div style="margin: 1em 0px;"><b>Review SLURM Job Submission Scripts</b>:</div>
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<div style="margin: 0px;">Identify where the <code>el7</code> constraint is being specified in your SLURM job submission scripts. This is typically done using the
<code>-C</code> or <code>--constraint</code> flag followed by the constraint specification. For example:
<code>--constraints=el7|el9</code></div>
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<div style="margin: 0px;">Remove the <code>el7</code> constraint from your job submission commands. If you have other constraints, adjust accordingly.</div>
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Failure to remove the <code>el7</code> constraint after maintenance day will result in failed job submissions. The resulting error will be similar to:</div>
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<code> Unable to allocate resources: Invalid feature specification</code></div>
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