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<div class="field-item even"><span class="date-display-single" property="dc:date" datatype="xsd:dateTime" content="2014-02-03T00:00:00+01:00">03/02/2014</span></div>
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<p>Dear Users,</p>
<p>the modifications to Eurora PBS scheduler were successfully implemented and the cluster is now open to job submission. As <a href="http://www.hpc.cineca.it/center_news/important-change-usage-and-queues-eurora" target="_blank">previously illustrated</a>, the new configuration aims at encouraging the <strong>development</strong> <strong>activities which exploit Eurora state-of-the-art accelerators</strong> (Intel Xeon Phi and Keplero GPU). Long production runs (up to 8 hours) will be allowed to run at nightime and weekends only (see below). Please consider using PLX for longer production runs and for jobs not involving the accelerators. </p>
<p>Different scheduling policies are now defined in two time intervals: the <strong>primetime</strong> (10 am - 6 pm weekdays) and the <strong>non-primetime</strong> (6 pm - 10 am weekdays, and from Friday 6 pm to Monday 10 am). <strong>A fair-share policy is also enforced</strong>, ordering the start times of jobs according to the resource usage history of users.</p>
<p>During primetime a new queue (the <strong>p_devel</strong>) is introduced for development, debugging, and optimization purposes. It is defined on specific nodes configured in order to fully exploit profiling and performance tools (such as Intel VTune Amplifier) in event-based sampling data collect. It must be explicitly requested when submitting the job.</p>
<p>The production queue longpar was renamed to <strong>np_longpar</strong>, and is only enabled during the non-primetime range. Its maximum walltime was reduced from 24 hours to 8 hours.</p>
<p>The remaining two queues, <strong>debug</strong> and <strong>parallel</strong>, are enabled both in the primetime and the non-primetime ranges. The parameters of the debug queue were not modified, while the maximum walltime for jobs of the parallel type was reduced from 6 to 4 hours. </p>
<p>In the new configuration, you do not need to specify the queue for the job types debug, parallel, and np_longpar. According to the requested resources and walltime the jobs, will be routed to the appropriate queue. The queue specification is instead required for the p_devel jobs.</p>
<p>Please, refer to the <a href="http://www.hpc.cineca.it/content/eurora-user-guide#batch" target="_blank">updated section on the online guide</a> to Eurora for details. </p>
<p>Best regards,</p>
<p>HPC User Support @ CINECA</p>
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