Compute Parameters¶

In the present page, we review the different compute parameters which can be set under the user interface.

Time limit¶

The user can specify the maximum time limit for the calculation to be run for. The format is HH:MM:SS in which H, M and S stand for day, hour, minute and second respectively. Thus, the example below would correspond to 12 hours exactly:

 1 12:00:00 

Please note that a calculation will be terminated when the runtime exceeds the maximum time specified in this field.

Cluster choice¶

A list of computing clusters is available for performing the desired calculation. The user can also visualize the status of each cluster, under the "See clusters status" option in the user interface.

Queue¶

Queues are used for managing the submission of Jobs to the computing clusters.

The user is offered the possibility to launch the desired job with a flexible set of hardware and resource allocation modes per queue. For example, the Debug ("D") queue is especially suited for preliminary tests, "fast" queues (eg. "OF")" are best for high-throughput or multi-node distributed memory runs, and "regular queues" (eg. OR) provide regular access to the scheduler.

Nodes / PPN¶

The desired number of computing nodes and the number of cores on each node (PPN = processors per node) can be selected, depending on the expected computational costs and requirements of the calculation under consideration. The necessary payments will have to be made as explained in this page, before the execution of any task can be made possible.