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<p>Dear Colleagues,</p>
<p>Please note this message from JLab Scientific Computing and plan
accordingly:</p>
<p>
<blockquote type="cite"><span style="color: rgba(0, 0, 0, 0.87); font-family: Roboto, "Helvetica Neue", sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">Following
the Jefferson Lab shutdown in January 2024, several
service-affecting data center changes are scheduled. The work
will be begin starting Tuesday Jan 2nd to avoid conflicts with
with the beam schedule for physics.</span>
<ul style="color: rgba(0, 0, 0, 0.87); font-family: Roboto, "Helvetica Neue", sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">
<li>The Tape Library will be out of service Tuesday Jan 2nd
until Monday, Jan 8th. The library will be modified to add
additional tape drive expansion room and a second robotic
accessor. Tape storage tools, including jcache and LQCD srm
tools, will not be available during that time. Farm jobs
requiring files from tape will queue until the library
reconfiguration is completed. Farm jobs running from disk
will continue to be scheduled.</li>
<li>A single day power outage for compute clusters including
the farm and LQCD is being coordinated with Facilities
Management during this period. Additional information will
follow once a date is fixed.</li>
<li>A Slurm upgrade to the farm is planned during this week.
Although Slurm upgrades are typically transparent to user
jobs, there is the possibility that the queue of pending
jobs will need to be cleared. Additional information about
the timing will follow. The Slurm upgrade will add new GPU
and CPU scheduling capabilities, patch security issues, and
prepare the farm for the AlmaLinux 9 upgrade.</li>
</ul>
</blockquote>
</p>
<p>Happy Holidays,</p>
<p>Alex<br>
</p>
<pre class="moz-signature" cols="72">--
Alexander Austregesilo
Staff Scientist - Experimental Nuclear Physics
Thomas Jefferson National Accelerator Facility
Newport News, VA
<a class="moz-txt-link-abbreviated" href="mailto:aaustreg@jlab.org">aaustreg@jlab.org</a>
(757) 269-6982
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