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16 November 2020

Publication details

R. Andreoli, T. Cucinotta. "Differentiated performance in NoSQL database access for Cloud HPC workloads," (to appear) in Proceedings of the 16th Workshop on Virtualization in High-Performance Cloud Computing (VHPC 2021), International Supercomputing Conference - High Performance (ISC 2021), July 2nd, 2021, Frankfurt, Germany (on-line event due to Covid-19).

Abstract

In recent years, the demand for cloud-based high-performance computing applications and services has grown in order to sustain the computational and statistical challenges of big-data analytics scenarios. In this context, there is a growing need for reliable large-scale NoSQL data stores capable of efficiently serving mixed high-performance and interactive cloud workloads. This paper deals with the problem of de- signing such NoSQL database service: to this purpose, a set of modifi- cations to the popular MongoDB software are presented. The modified MongoDB lets clients submit individual requests or even carry out whole sessions at different priority levels, so that the higher-priority requests are served with shorter response times that exhibit less variance, with re- spect to lower-priority requests. Experimental results carried out on two big multi-core servers using synthetic workload scenarios demonstrate the effectiveness of the proposed approach in providing differentiated performance levels, highlighting what trade-offs are available between maximum achievable throughput for the platform, and the response-time reduction for higher-priority requests.


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