Change in HPC allocation process at CHPC beginning October 1st, 2013

Posted: August 21, 2013

In an effort to streamline and more efficiently operate, beginning with Fall 2013 (Oct-Dec), CHPC will be changing two aspects of our allocation system. First, we will be creating one pool for both the EMBER cluster and the new KINGSPEAK cluster. The second aspect is that we will change the metric to 1 Service Unit (SU) = 1 CPU-core-wall-clock-hour on EMBER, and 1.5 SUS = 1 CPU-core-wall-clock-hour on KINGSPEAK.

Those renewing allocations (starting now) for Fall 2013 calendar quarter (and after) should submit their requests using the new metric. The allocation application form has been modified to reflect this change. These allocations are due September 9th, 2013.

We will be converting all previously awarded EMBER allocations to the new metric.

Note: Some codes may not achieve 50% increase in performance on KINGSPEAK. You should benchmark your codes on both systems to see where it performs most efficiently. Smaller performance increase on KINGSPEAK may indicate sub-optimal vectorization of the code, in which case we recommend contacting CHPC on ways to improve code vectorization.

Previously awarded UPDRAFT allocations for Fall 2013 (Oct-Dec) will honored (with no adjustment to SU metric) as UPDRAFT awards. No further awards, however, will be made on UPDRAFT. Existing Spring 2014 (Jan-Mar) UPDRAFT awards will be converted to an award that can be used on either EMBER or KINGSPEAK using the new metric. After December 31, 2013 the general side of UPDRAFT will be run in freecycle until there is no longer space available in the Komas Data Center, or UPDRAFT is no longer cost effective to operate, whichever comes first.

We will continue to provide you with Allocation and Usage data (see: Usage) for both UPDRAFT and the new pooled allocation beginning October 1st 2013. Please let us know if you have any questions by sending email to