Quota-constrained Job Submission Behavior at Commercial Supercomputer.

Understanding user behavior is great helpful for assessing HPC system job scheduling, promoting allocation efficiency and improving user satisfaction. Current research on user behavior is mainly focused on think time (i.e. time between two consecutive jobs) of non-commercial supercomputer systems. In this paper, we present a methodology to characterize workloads of the commercial supercomputer. We use it to analyze the 2.7 million jobs of different users in various fields of Tianhe-1A from 2016.01 to 2017.12 and 0.89 million jobs of Sugon 5000A from 2015.09 to 2017.03. In order to identify the main factors affecting the user's job submission behavior on commercial supercomputers, this paper analyzed the correlation between user's job submission behavior and various factors such as job characteristics and quota constraint. The result shows that, on the commercial supercomputer, user s job submission behavior is not obviously affected by the previous job's runtime and waiting time. It is affected by the number of processors the job uses, the previous job's status and the size of the total resources that users can submit jobs. We also find that, there are three job submission peaks on each day. In the time window of 8 h, 86% jobs of a same user have the same number of processors and nearly 40% of them have little difference in runtime.