<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Hi everyone,<br>
<br>
My apologies for this belated mail. Today Peregrine is down for
planned maintenance: see below.<br>
<br>
Regards,<br>
Ewout Helmich<br>
<br>
<br>
-----------------<br>
<br>
Dear Peregrine users,
<div><br>
</div>
<div>Due to network maintenance in the DUO data center, the
Peregrine cluster will be unavailable on April 17. We will use
this downtime to do some regular maintenance as well, which
includes the following things:</div>
<div>
<ul>
<li>install security and (minor) operating system updates;</li>
<li>perform file system checks on all Lustre file systems;</li>
<li>update the SLURM scheduler to the latest version;</li>
<li>reorganize the software repository to allow for automatic
selection of the right (CPU optimized) version of software
modules on each type of compute node;</li>
<li>install a job profiling framework that allows you to monitor
the resource usage of your job in much more detail.</li>
</ul>
<div>You can read more about the last two items in <a
href="https://redmine.hpc.rug.nl/redmine/attachments/download/517/April%203,%202018.pdf">the
second issue of The Flying Falcon newsletter</a>.</div>
<div><br>
</div>
<div>The cluster should be back online before the end of the day,
and we will let you know when the maintenance has completed.</div>
</div>
<div><br>
</div>
<div>In order to drain all the compute nodes and make sure that no
jobs are running anymore on April 17, we created a reservation
that prevents any jobs from starting if they are not guaranteed to
complete before this day.</div>
<div><br>
</div>
<div>Best regards,</div>
<div>The HPC Team</div>
</body>
</html>