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Sept. 30, 2015 Cluster Maintenance Window Announcement 

Some compute node capacity was recently added as part of an end of Spring 2015  compute node purchase.  Additional nodes will be added during the next several weeks to the compute node pool. The net effect of this additional capacity is to help reduce slurm job placement times, especially during busy periods of use.   As the cluster environment matures it has become increasingly clear that there is a need for a standing maintenance window, similar  to that found at other HPC sites. Thus far we have found ways to minimize user impact due to system changes without such a window.  Our plan is to target Wednesday mornings at  6-7 AM starting 9/30/15.   For the most part, maintenance activities during this window will not have any direct effects on access or job placements. Network concurrent license service is another possible service interruption during these windows.  With history as a guide, these events are on the order of several minutes or less and don't happen all that often.    In cases where user impact is expected, sufficient notification will be  given.  If you would like to express any concerns please contact us at

May 12, 2015 Nercomp Data Challenge