<div dir="ltr"><div class="gmail_default" style="font-size:small">Please be mindful of these HPCC maintenance dates.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Vivian</div><div class="gmail_default" style="font-size:small"><br></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">---------- Forwarded message ---------<br>From: <strong class="gmail_sendername" dir="auto">HPCC_noreply</strong> <span dir="auto"><<a href="mailto:no-reply@hpcc.ucr.edu">no-reply@hpcc.ucr.edu</a>></span><br>Date: Mon, Aug 4, 2025 at 7:14 AM<br>Subject: [UCR HPCC] Summer Maintenance Shutdown UPDATE
<br>To: HPCC User <<a href="mailto:weil@ucr.edu">weil@ucr.edu</a>><br></div><br><br><u></u>
<div style="display:none;overflow:hidden;line-height:1px;opacity:0;max-height:0;max-width:0">[UCR HPCC] Summer Maintenance Shutdown UPDATE
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<p style="font-size:14px;line-height:26px;margin:16px 0;font-weight:700;color:#0b4c91">HPCC Summer Maintenance Shutdown UPDATE</p>
<p style="font-size:14px;line-height:26px;margin:16px 0;font-weight:700;color:#0b4c91">When</p>
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<li style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043">Begins: Friday, August 8, 12am</li>
<li style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043">Ends: Monday, August 11, evening</li>
<li style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043">Follow-up outage: Early September (tentative)</li>
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<p style="font-size:14px;line-height:26px;margin:16px 0;font-weight:700;color:#0b4c91">Description</p>
<p style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043">The previous July 28 maintenance shutdown has been <b>rescheduled to midnight on August 8</b>. This is to combine cluster maintenance with the installation of a new battery backup system in the SOMED data center.</p>
<p style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043">A previous estimate led us to place a Slurm reservation block for 6pm. Because the final shutdown time is sooner, you might have scheduled jobs that extend into the maintenance window. If so, your job will be interrupted and automaticaly re-queued.</p>
<p style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043">In addition, we have been notified that a second, follow-up outage will be needed to finish the battery backup installation, and is currently targeting the first week of September. If so, this second outage is expected to be much shorter and limited in scope.</p>
<p style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043">HPCC apologizes for the uncertainty and disruptions caused by these sudden developments. These maintenance events are necessary for the long-term health of the cluster and related systems. Thanks for your continued support and understanding.</p>
<p style="font-size:14px;line-height:26px;margin:16px 0;font-weight:700;color:#0b4c91">Services Impacted</p>
<p style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043">Most services hosted by HPCC will be down during this period. This includes, but is not limited to:</p>
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<li style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043">Cluster access (SSH, Slurm, data access), including web browser (HTTP) access to user data.</li>
<li style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043">All services provided by OnDemand: RStudio/Posit, MATLAB, Jupyter, etc.</li>
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<p style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043"><b>Normal email support (<a href="mailto:support@hpcc.ucr.edu" target="_blank">support@hpcc.ucr.edu</a>) will be down early Friday.</b> Our email support systems should come back online around noon. HPCC's Slack workspace (<a href="https://ucr-hpcc.slack.com" target="_blank">https://ucr-hpcc.slack.com</a>) will be the main means of group communication with users during maintenance events. We strongly encourage users to become familiar with our Slack workspace ahead of the shutdown.</p>
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<td><p style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043">Contacts</p>
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<td><p style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043">Austin Leong<br>Sr. HPC Systems Administrator<br><a href="mailto:austin.leong@ucr.edu" target="_blank">austin.leong@ucr.edu</a></p>
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<td><p style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043">Emerson Jacobson<br>HPC Systems Administrator<br><a href="mailto:emerson.jacobson@ucr.edu" target="_blank">emerson.jacobson@ucr.edu</a></p>
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<td><p style="font-size:14px;line-height:22px;margin:16px 0;color:#3c4043">Thomas Girke<br>Professor<br>Director of HPC Center<br><a href="mailto:thomas.girke@ucr.edu" target="_blank">thomas.girke@ucr.edu</a></p>
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